Common Mass Spectrometry Contaminants and their Sources
The contaminant information below is taken from "Interferences and contaminants encountered in modern mass spectrometry" Bernd O.
Keller, Jie Sui, Alex B. Young and Randy M. Whittal Analytica Chimica Acta 627, Issue 1, 3 October 2008, Pages 71-81
List of potential interference- or contaminant ions in modern mass spectrometry, positive mode
Monoisot
opic ion
mass
(singly
charged)
Ion type
33.03349
[M+H]
+
[M+H]
+
42.03383
X
CH3CN
ACN
Acetonitrile, solvent
X
A
A, F
References
A
CH3CN
ACN
Acetonitrile, solvent
PEG
Polyethylene glycol, ubiquitous polyether
X
D, K
+
CH3CN
ACN
Acetonitrile, solvent
X
A, F
+
CH3OH
Methanol
Methanol, solvent
X
A
A, C, F
[M+Na]
65.05971
[M2+H]
74.06004
+
C3H7NO
Dimethyl formamide
solvent
X
+
(CH3CN)n(CH3OH)m
Acetonitrile/Methanol
ESI solvents
X
K
+
[C3H6O]nH2O
PPG
Polypropylene glycol, ubiquitous polyether
X
D, K
C2H6OS
DMSO
Dimethylsulfoxide, solvent
X
A
ESI solvents
X
A, C
Polyethylene glycol, ubiquitous polyether
X
D, K
74.06004
[A1B1+H]
77.05971
[A1B+H]
79.02121
[M+H]
85.02600
Acetonitrile, solvent
MALDI
[C2H4O]nH2O
[A1B+H]
+
[M2+H]
Methanol
ESI
+
[M+NH4]
83.06037
CH3OH
Possible origin and other comments
X
63.04406
[M+H]
Compound ID or
species
+
59.06037
64.01577
Formula for M or subunit or
sequence
+
CH3CN
Acetonitrile
+
[C2H4O]nH2O
PEG
C2D6OS
d6-DMSO
d6-Dimethylsulfoxide, solvent
X
A
+
(CH3CN)n(HCOOH)m
Acetonitrile/Formic Acid
ESI solvents
X
A, C
ESI solvents
X
C
[A1B+Na]
+
85.05887
[M+H]
88.03931
[A1B1+H]
96.04198
[A1B1+Na]
+
(CH3CN)n(CH3OH)m
Acetonitrile/Methanol
99.04165
+
[C3H6O]nH2O
PPG
Polypropylene glycol, ubiquitous polyether
X
D, K
100.07569
[A1B+Na]
[M+H]
+
C5H10NO
NMP
N-methyl 2-pyrrolidone; solvent, floor stripper
X
K
+
[C2H4O]nH2O
PEG
Polyethylene glycol, ubiquitous polyether
X
D, K
+
C2H6OS
Dimethylsulfoxide, solvent
X
A, C
100.99994
[A1B+K]
101.00316
[M+Na]
DMSO
[A2B2+H]
+
[MeOH]n[H2O]m
Methanol/Water
ESI solvents
X
102.05496
[A1B1+H]
+
(CH3CN)n(CH3COOH)m
Acetonitrile/Acetic Acid
ESI solvents
X
K
102.12773
[M+H]
X
A, C
103.95560
[M+ Cu]
104.99229
101.08084
+
C6H15N
TEA
Triethylamine, buffer
C2 H3 N
ACN
Acetonitrile, solvent
X
A,C
+
C2H3O2Na
Sodium acetate
ESI solvents
X
K
C2 H3 N
ACN
Acetonitrile, solvent
X
A,C
63
[M+Na]
K
+
105.04232
[M2+Na]
+
105.95379
65
[M+ Cu]
+
C2 H3 N
ACN
Acetonitrile, solvent
X
A, C
107.07027
[A2B+H]
+
[C2H4O]nH2O
PEG
Polyethylene glycol, ubiquitous polyether
X
D, K
115.01559
[A1B+K]
+
[C3H6O]nH2O
PPG
Polypropylene glycol, ubiquitous polyether
X
D, K
X
A
Dimethylsulfoxide, solvent
X
A
A
115.08659
[A1B1+H]
+
120.04776 [M+CH3CN+H]
122.08117
[M+H]
(CH3CN)n(C3H7NO)m
+
+
+
Acetonitrile/Dimethylformamide solvent
C2H6OS
DMSO
C4H11NO3
TRIS
TRIS, buffer
X
[MeOH]n[H2O]m
Methanol/Water
ESI solvents
X
K
C7H10N2
DMAP
Dimethylaminopyridine, solvent
X
A, C
ESI solvents
X
K
Polyethylene glycol, ubiquitous polyether
X
D, K
123.06278
[A2B2+Na]
123.09167
[M+H]
124.03690
[A1B1+Na]
+
(CH3CN)n(CH3COOH)m
Acetonitrile/Acetic Acid
129.05222
+
[C2H4O]nH2O
PEG
C8H19N
DIPEA
Diisopropylethylamine, solvent
X
A
Cs
Cs-133
Cesium, from Cesium Iodide used as calibrant
X
V
ESI solvents
X
K
Polypropylene glycol, ubiquitous polyether
X
D, K
130.15903
132.90490
+
[A2B+Na]
[M+H]
M
+
+
133.10705
[A3B2+H]
+
[MeOH]n[H2O]m
Methanol/Water
135.10157
+
[C3H6O]nH2O
PPG
C2H6OS
DMSO
Dimethylsulfoxide, solvent
X
A, F
C2H6OS
DMSO
Dimethylsulfoxide, solvent
X
A
C9H21N
TPA
Tripropylamine, solvent
X
A, C
CH3CN
ACN
Acetonitrile, solvent, together with m/z 147
X
A, C
D, K
[A2B+H]
[M+CH3CN+NH4
+
137.07431
]
142.02971 [M+CH3CN+Na]
144.17468
[M+H]
+
63
144.98215
[M2+ Cu]
145.02615
+
146.06887
[A2B+K]
[M3+Na]
+
+
65
+
146.98034
[M2+ Cu]
147.11280
+
149.02332
150.12773
[A2B2+H]
[f+H]
+
[M+H]
+
+
[C2H4O]nH2O
PEG
Polyethylene glycol, ubiquitous polyether
X
CH3CN
ACN
Acetonitrile, solvent
X
A, C
CH3CN
ACN
Acetonitrile, solvent, together with m/z 145
X
A, C
(CH3CN)n(CH3OH)m
Acetonitrile/Methanol
ESI solvents
X
K
C8 H4 O3
Pthalic Anhydride
fragment ion originating from phthalate esters
X
A, Z
solvent
X
A, C
C10H15N
Phenyldiethylamine
+
151.09649
[A3B+H]
153.13862
[M+H]
+
155.08900
[A3B2+Na]
157.03515
[M2+H]
+
+
157.08352
[A2B+Na]
158.96403
+
[M+Na]
+
163.03897
[M-CH3OH+H]
163.13287
[M+H]
169.09475
[A2B2+Na]
+
+
169.11046
[M2+H]
171.00527
+
172.03931
173.05745
[f+Na]
[M-H2O+H]
[A2B+K]
[A3B+Na]
179.01709
[M2+Na]
181.12231
[M+H]
+
[M+H]
+
+
[A4B3+H]
185.11482
[M+Na]
+
186.22163
[M+H]
+
189.05237
[A3B+K]
190.04987
+
+
193.14344
[A3B+H]
195.06519
+
[M+H]
X
D, K
C9H16N2
DBU
1,8-Diazabicyclo[5.4.0]undec-7-ene
X
A, C
ESI solvents
X
K
Dimethylsulfoxide, solvent
X
A, C
Polypropylene glycol, ubiquitous polyether
X
D, K
Sodium trifluoroacetate, salt
X
A, C
Phthalate esters, plasticizer
Diethylene glycol monobutyl ether, cpd. In
scintillation cocktail
X
A
X
Q
ESI solvents
X
K
d6-Dimethylsulfoxide, solvent
X
A
from phthalate esters, plasticizer
X
A
[MeOH]n[H2O]m
Methanol/Water
C2H6OS
DMSO
[C3H6O]nH2O
PPG
C2F3O2Na
NaTFA
C10H10O4
Dimethyl phthalate
C8H18O3
DGBE
(CH3CN)n(CH3OH)m
Acetonitrile/Methanol
C2D6OS
d6-DMSO
C8 H4 O3
Phthalic anhydride
C10H7NO3
4-HCCA
[C3H6O]nH2O
PPG
Polypropylene glycol, ubiquitous polyether
X
D, K
[C2H4O]nH2O
PEG
Polyethylene glycol, ubiquitous polyether
X
D, K
C2H6OS
DMSO
Dimethylsulfoxide, solvent
X
A, C
C11H16O2
BHA
Butylated hydroxyanisole, antioxidant additives
X
K
C13H10O
DPK
Diphenyl ketone
X
K
[MeOH]n[H2O]m
Methanol/Water
ESI solvents
X
K
C8H18O3
GE
glycol ether
X
K
C12H27N
TBA
Tributylamine, solvent
X
A
[C2H4O]nH2O
PEG
Polyethylene glycol, ubiquitous polyether
X
D, K
C10H7NO3
4-HCCA
[C3H6O]nH2O
PPG
C10H10O4
Dimethyl phthalate
X
matrix compound
X
matrix compound
H, I, J
H, I, J
Polypropylene glycol, ubiquitous polyether
X
D, K
Phthalate esters, plasticizer
X
A
D, K
[C2H4O]nH2O
PEG
Polyethylene glycol, ubiquitous polyether
+
C11H16O2
BHA
Butylated hydroxyanisole, antioxidant additives
X
K
[MeOH]n[H2O]m
Methanol/Water
ESI solvents
X
K
C10H7NO3
4-HCCA
C10H15NO2S
n-BBS
[A4B+H]
[M+Na]
[A4B3+Na]
+
+
212.03181
[M+Na]
214.08963
+
[M+H]
Polyethylene glycol, ubiquitous polyether
X
203.10425
215.12538
+
PEG
+
195.12270
205.12578
+
+
183.14383
[M+H]
+
+
173.07843
183.08044
+
+
[C2H4O]nH2O
[A3B+Na]
+
[C3H6O]nH2O
PPG
X
matrix compound, sodiated
H, I, J
n-butyl benzenesulfonamide, plasticizer
X
A, K
Polypropylene glycol, ubiquitous polyether
X
D, K
217.10465
[A4B+Na]
221.18999
[M+H]
+
225.19614
[M+H]
+
228.00575
231.09932
231.11618
233.07858
[M+K]
+
+
[A3B+K]
BTH
Butylated hydroxytoluene, Antioxidant
X
K
DCU
N,N'-Dicyclohexylurea
X
A
PPG
C10H15NO2S
n-BBS
+
[C2H4O]nH2O
PEG
+
C10H15NO2S
n-BBS
+
[C2H4O]nH2O
PEG
239.22485
[(M.H Cl)2-Cl]
X
matrix compound, potassiated
H, I, J
Polypropylene glycol, ubiquitous polyether
X
D, K
n-butyl benzenesulfonamide, plasticizer
X
A
Polyethylene glycol, ubiquitous polyether
X
D, K
n-butyl benzenesulfonamide, plasticizer
X
A
Polyethylene glycol, ubiquitous polyether
X
D, K
35
+
C6H15N
TEA.HCl
Triethylamine-hydrochloride, buffer
X
A
37
+
C6H15N
TEA.HCl
Triethylamine-hydrochloride, buffer
X
A
C16H36N
TBA
Tetrabutylammonium, buffer
X
A, C
[(M.H Cl)2-Cl]
M
+
243.11683
M
+
243.17194
[M+Na]
257.03103
C15H24O
C13H24N2O
[C3H6O]nH2O
[M+Na]
251.20056
D, K
+
[A5B+H]
251.18530
X
4-HCCA
239.14892
242.28423
Polyethylene glycol, ubiquitous polyether
C10H7NO3
236.07157
241.22190
PEG
+
[M+NH4]
[A4B+K]
[C2H4O]nH2O
C19H15
Trityl cation
Trityl cation, [Ph3C]+
X
A
+
C15H24O
BTH
Butylated hytroxytoluene, Antioxidant additives
X
K
[A4B+H]
+
[C3H6O]nH2O
PPG
Polypropylene glycol, ubiquitous polyether
X
D, K
[AB1+H]
+
[C14H22O][C2H4O]n
Triton
X-100, X-114, X-405, or X-45 Detergents
X
D, K
+
C2H6OS
DMSO
Dimethylsulfoxide, solvent
X
A
[C2H4O]nH2O
PEG
Polyethylene glycol, ubiquitous polyether
X
D, K
101 Detergents
X
D, K
[M3+Na]
+
261.13086
[A5B+Na]
265.21621
[AB1+H]
+
267.17197
+
[M+H]
+
[C15H24O][C2H4O]n
Triton
C12H27O4P
TBP
Tributylphosphate
X
A
C20H17O
MMT
Monomethoxytrityl cation
X
A
[A4B+Na]
+
[C3H6O]nH2O
PPG
Polypropylene glycol, ubiquitous polyether
X
D, K
273.18250
[AB1+Na]
+
[C14H22O][C2H4O]n
Triton
X-100, X-114, X-405, or X-45 Detergents
X
D, K
277.10480
[A5B+K]
+
[C2H4O]nH2O
PEG
Polyethylene glycol, ubiquitous polyether
X
D, K
279.09333
[M+H]
+
C18H15OP
TPO
Triphenylphosphine oxide
X
A
[M+H]
+
C16H22O4
Dibutylphthalate
Plasticiser, phtalate ester
X
A, C
[C14H28O][C2H4O]n
Triton, reduced
X-100R, X-114R, X-405R, or X-45R Detergents
X
D, K
C18H35NO
Oleamide
Slip agent in polyethylene films
X
A
[C2H4O]nH2O
PEG
Polyethylene glycol, ubiquitous polyether
X
D, K
C18H37NO
Stearamide
Slip agent in polyethylene films
X
A
273.12739
273.16725
279.15909
279.22945
282.27914
M
[AB1+Na]
[M+H]
+
283.17513
[A6B+H]
284.29479
+
[M+H]
+
+
287.19815
[AB1+Na]
288.25332
[M+H]
+
+
289.14118
[A4B+K]
293.24510
[AB1+Na]
295.22677
301.14103
304.26108
+
[C15H24O][C2H4O]n
Triton
C16H33NO3
n,n-DDA
[C3H6O]nH2O
PPG
[C15H30O][C2H4O]n
Triton, reduced
+
[C14H22O][C2H4O]n
Triton
[M+Na]
+
C16H22O4
Dibutylphthalate
[M+Na]
+
C18H35NO
Oleamide
[AB2+H]
+
+
101 Detergents
n,n-bis(2-hydroxyethyl) dodecanamide, anti-static
agent
X
D, K
X
A
Polypropylene glycol, ubiquitous polyether
X
D, K
101R Detergents
X
D, K
X-100, X-114, X-405, or X-45 Detergents
X
D, K
Dibutylphthalate, plasticizer
X
A
Slip agent in polyethylene films
X
A
Polyethylene glycol, ubiquitous polyether
X
D, K
Slip agent in polyethylene films
X
A
305.15708
[A6B+Na]
[C2H4O]nH2O
PEG
306.27673
+
C18H37NO
Stearamide
[A5B+H]
+
[C3H6O]nH2O
PPG
Polypropylene glycol, ubiquitous polyether
X
D, K
309.24242
[AB2+H]
+
[C15H24O][C2H4O]n
Triton
101 Detergents
X
D, K
315.25299
+
C18H34O4
DBS
Dibutyl sebacate, plasticizer
C16H22O4
Dibutylphthalate
Dibutylphthalate, plasticizer
X
A
D, K
309.22717
317.11497
[M+Na]
[M+H]
[M+K]
+
317.20872
[AB2+Na]
321.13101
[A6B+K]
+
+
+
X
[C14H22O][C2H4O]n
Triton
X-100, X-114, X-405, or X-45 Detergents
X
[C2H4O]nH2O
PEG
Polyethylene glycol, ubiquitous polyether
X
D, K
[C14H28O][C2H4O]n
Triton, reduced
X
D, K
X
Q
323.25567
[AB2+Na]
325.25847
[M2+H]
+
C8H18O3
DGBE
X-100R, X-114R, X-405R, or X-45R Detergents
Diethylene glycol monobutyl ether, cpd. In
scintillation cocktail
327.07807
+
C18H15O4P
TPP
Triphenyl phosphate, flame retardant in plastics
X
X
[C2H4O]nH2O
PEG
Polyethylene glycol, ubiquitous polyether
X
D, K
D, K
327.20135
[M+H]
[A7B+H]
+
[A5B+Na]
+
[C3H6O]nH2O
PPG
Polypropylene glycol, ubiquitous polyether
X
331.22437
[AB2+Na]
+
[C15H24O][C2H4O]n
Triton
101 Detergents
X
D, K
337.11841
+;
C13H28O2Sn
Tributyl tin formate
Tributyl tin formate, catalyst
X
A
[C15H30O][C2H4O]n
Triton, reduced
101R Detergents
X
D, K
Erucamide, (Cis-13-docosenoic amide)
X
A
331.20911
337.27132
338.34174
[M+H] (
120
Sn)
[AB2+Na]
[M+H]
+
+
C22H43NO
Erucamide
+
[C14H22O][C2H4O]n
Triton
X-100, X-114, X-405, or X-45 Detergents
X
D, K
+
[C3H6O]nH2O
PPG
Polypropylene glycol, ubiquitous polyether
X
D, K
[C2H4O]nH2O
PEG
Polyethylene glycol, ubiquitous polyether
X
D, K
[C15H24O][C2H4O]n
Triton
101 Detergents
X
D, K
[C2H6SiO]5
Polysiloxane
Polysiloxane, (neutral methane loss from m/z 371)
X
A, C, L
339.25299
[AB3+H]
347.18305
[A5B+K]
+
349.18329
[A7B+Na]
353.26864
+
355.06994
[AB3+H]
[M+H-CH4]
+
355.36829
360.32368
[M-Cl]
+
[M+Na]
C22H47N2OCl
+
X-100, X-114, X-405, or X-45 Detergents
X
D, K
Polyethylene glycol, ubiquitous polyether
X
D, K
+
[C3H6O]nH2O
PPG
Polypropylene glycol, ubiquitous polyether
X
D, K
[C14H28O][C2H4O]n
Triton, reduced
X
D, K
C25H54NCl
BTAC-228
X-100R, X-114R, X-405R, or X-45R Detergents
Behentrimonium chloride, personal care product
additive
X
O
[C2H6SiO]5
Polysiloxane
Polysiloxane, followed by m/z 388
X
A, C., E, L
Polyethylene glycol, ubiquitous polyether
X
D, K
Bis(2-ethylhexyl) adipate, plasticizer
X
N, X
[AB3+Na]
368.42508
[M-Cl]
+
[A8B+H]
371.31559
[M+H]
+
371.31559
[M+H]
+
+
375.25058
[AB3+Na]
379.09246
+
381.29753
[AB3+Na]
383.27920
[AB4+H]
391.28429
+
+
371.22756
389.25098
+
+
[C2H4O]nH2O
PEG
C22H42O4
DEHA
C22H42O4
DOA
Dioctyl adipate, plasticizer
X
X
[C15H24O][C2H4O]n
Triton
101 Detergents
X
D, K
C10H7NO3
4-HCCA
[C15H30O][C2H4O]n
Triton, reduced
+
[C14H22O][C2H4O]n
Triton
+
[C2H6SiO]5
Polysiloxane
+
[C3H6O]nH2O
PPG
C24H38O4
Diisooctyl phthalate
[C2H4O]nH2O
PEG
[M+NH4]
[A6B+Na]
[M+H]
A
PEG
367.28188
388.12779
X
Triton
[A6B+H]
[M2+H]
Erucamide, (Cis-13-docosenoic amide)
[C2H4O]nH2O
[A7B+K]
[M+H]
Erucamide
O
[C14H22O][C2H4O]n
[AB3+Na]
365.15723
371.10124
C22H43NO
X
+
361.23493
367.26903
+
Palmitamidopropyl-trimonium chloride, personal
care products additive
+
+
X
matrix cluster, dimer
H, I, J
101R Detergents
X
D, K
X-100, X-114, X-405, or X-45 Detergents
X
D, K
Polysiloxane, (see m/z 371)
X
A, C, L
Polypropylene glycol, ubiquitous polyether
X
D, K
Diisooctyl phthalate, plasticiser
X
A, C, E
Polyethylene glycol, ubiquitous polyether
X
D, K
D, K
393.20951
[A8B+Na]
397.29485
+
[C15H24O][C2H4O]n
Triton
101 Detergents
X
+
[C3H6O]nH2O
PPG
Polypropylene glycol, ubiquitous polyether
X
X
D, K
[C14H22O][C2H4O]n
Triton
X-100, X-114, X-405, or X-45 Detergents
X
X
D, K
[C2H4O]nH2O
PEG
Polyethylene glycol, ubiquitous polyether
X
X
D, K
X-100R, X-114R, X-405R, or X-45R Detergents
X
X
D, K
405.22491
[AB4+H]
[A6B+K]
+
405.26115
[AB4+Na]
409.18344
+
[A8B+K]
+
411.30810
[AB4+Na]
[C14H28O][C2H4O]n
Triton, reduced
413.26623
[M+Na]
+
C24H38O4
Diisooctyl phthalate
Diisooctyl phthalate, plasticiser
X
X
A, C, E
415.25378
[A9B+H]
+
[C2H4O]nH2O
PEG
Polyethylene glycol, ubiquitous polyether
X
X
D, K
[C15H24O][C2H4O]n
Triton
101 Detergents
X
X
D, K
[C3H6O]nH2O
PPG
Polypropylene glycol, ubiquitous polyether
X
X
D, K
[C15H30O][C2H4O]n
Triton, reduced
101R Detergents
X
X
D, K
[C14H22O][C2H4O]n
Triton
X-100, X-114, X-405, or X-45 Detergents
X
X
D, K
+
419.27680
[AB4+Na]
425.31090
+
[A7B+H]
+
425.32375
[AB4+Na]
427.30542
+
[AB5+H]
429.08873
[M+H-CH4]
+
429.24017
[M+K]
437.23572
[A9B+Na]
441.01479
441.32107
443.01298
+
63
[M3+ Cu(I)]
[AB5+H]
65
[M3+ Cu(I)]
[M+H]
447.29284
[M+H]
+
449.28736
[AB5+Na]
449.38500
+
[M2+H]
453.20966
[A9B+K]
453.34353
[M+H]
+
+
+
445.12003
+
+
+
+
+
454.29278 [M+CH3CN+Na]
Polysiloxane
C24H38O4
Diisooctyl phthalate
[C2H4O]nH2O
PEG
C10H7NO3
4-HCCA
[C15H24O][C2H4O]n
Triton
C10H7NO3
4-HCCA
[C2H6SiO]6
Polysiloxane
Diisooctyl phthalate, plasticiser
X
X
A, C
Polyethylene glycol, ubiquitous polyether
X
X
D, K
X
K
X
D, K
X
K
matrix-copper adduct, together with m/z 443
101 Detergents
X
matrix-copper adduct, together with m/z 443
Polysiloxane, followed by m/z 462
X
X
A, C, E, L
Polypropylene glycol, ubiquitous polyether
X
X
D, K
X-100, X-114, X-405, or X-45 Detergents
X
X
D, K
C13H24N2O
DCU
N,N'-Dicyclohexylurea
X
X
A, C
[C2H4O]nH2O
PEG
X
X
D, K
C24H44N4O4
nylon
Polyethylene glycol, ubiquitous polyether
Cyclic oligomer of polyamide 66, (adipic
acid/hexylmethylene diamine condensation)
X
X
M
Diisooctyl phthalate, plasticiser
X
X
A
X-100R, X-114R, X-405R, or X-45R Detergents
X
X
D, K
Polyethylene glycol, ubiquitous polyether
X
X
D, K
Polysiloxane (see m/z 445)
X
X
A, L
[C14H28O][C2H4O]n
Triton, reduced
[C2H4O]nH2O
PEG
+
[C2H6SiO]6
Polysiloxane
+
[M+NH4]
L
PPG
+
[A10B+H]
X
Triton
Diisooctyl phthalate
[AB5+Na]
X
[C3H6O]nH2O
C24H38O4
459.27999
Polysiloxane, (neutral methane loss from m/z 445)
[C14H22O][C2H4O]n
+
455.33431
462.14658
+
[C2H6SiO]6
[C3H6O]nH2O
PPG
Polypropylene glycol, ubiquitous polyether
X
X
D, K
[AB5+Na]
+
[C15H24O][C2H4O]n
Triton
101 Detergents
X
X
D, K
469.34996
[AB5+Na]
+
[C15H30O][C2H4O]n
Triton, reduced
101R Detergents
X
X
D, K
471.33163
[AB6+H]
[C14H22O][C2H4O]n
Triton
X-100, X-114, X-405, or X-45 Detergents
X
X
D, K
472.28781
+
SLPR
Peptide
porcine trypsin
X
X
G
463.26678
463.30301
[A7B+K]
[M+H]
+
+
481.26194
[A10B+Na]
[C2H4O]nH2O
PEG
Polyethylene glycol, ubiquitous polyether
X
X
D, K
483.35276
[A8B+H]
+
[C3H6O]nH2O
PPG
Polypropylene glycol, ubiquitous polyether
X
X
D, K
[AB6+H]
+
[C15H24O][C2H4O]n
Triton
101 Detergents
X
X
D, K
X-100, X-114, X-405, or X-45 Detergents
Dipalmityldimethylammonium chloride, catalyst,
personal care products additive
X
X
D, K
X
X
O, K
Polyethylene glycol, ubiquitous polyether
X
X
D, K
X-100R, X-114R, X-405R, or X-45R Detergents
X
X
D, K
Polysiloxane, (neutral methane loss from m/z 519)
X
X
A, L
Polyethylene glycol, ubiquitous polyether
X
X
D, K
485.34728
493.31358
[AB6+Na]
494.56593
[M-Cl]
497.23587
499.36053
+
+
[A10B+K]
+
[AB6+Na]
+
503.10752
[M+H-CH4]
503.30621
+
[A11B+H]
+
[C14H22O][C2H4O]n
Triton
C34H72NCl
DPDMA
[C2H4O]nH2O
PEG
[C14H28O][C2H4O]n
Triton, reduced
[C2H6SiO]7
Polysiloxane
[C2H4O]nH2O
PEG
[A8B+Na]
+
[C3H6O]nH2O
PPG
Polypropylene glycol, ubiquitous polyether
X
X
D, K
507.32923
[AB6+Na]
+
[C15H24O][C2H4O]n
Triton
101 Detergents
X
X
D, K
513.37618
[AB6+Na]
+
[C15H30O][C2H4O]n
Triton, reduced
101R Detergents
X
X
D, K
IQVR
Peptide
trypsin-like artefact
X
X
E
[C14H22O][C2H4O]n
Triton
X-100, X-114, X-405, or X-45 Detergents
X
X
D, K
C30H58O4S
DDTDP
Didodecyl 3,3′-thiodipropionate, antioxidant
X
X
W
[C2H6SiO]7
Polysiloxane
Polysiloxane, followed by m/z 536
X
X
A, L
[C3H6O]nH2O
PPG
X
X
D, K
C36H76NCl
SPDMA
Polypropylene glycol, ubiquitous polyether
Stearyl-palmityldimethylammonium chloride,
catalyst, personal care product additive
X
X
O, K
[C2H4O]nH2O
PEG
Polyethylene glycol, ubiquitous polyether
X
X
D, K
[C15H24O][C2H4O]n
Triton
X
X
D, K
C30H58O5S
DDTDP
X
X
W
C35H62O3
Irganox
101 Detergents
Didodecyl 3,3′-thiodipropionate oxidized to
sulfoxide, antioxidant
Irganox 1076, antioxidant in synthetic polymers,
antioxidant
X
X
W
[C2H6SiO]7
Polysiloxane
Polysiloxane (see m/z 519)
X
X
A, L
X
505.33471
515.33001
[M+H]
+
515.35785
[AB7+H]
515.41286
[M+H]
+
[M+H]
+
519.13882
521.30864
[A8B+K]
522.59723
+
[M-Cl]
+
+
525.28815
[A11B+Na]
529.37350
[AB7+H]
+
531.40777
[M+H]
+
531.47717
[M+H]
+
536.16537
537.33979
[M+NH4]
+
+
+
[C14H22O][C2H4O]n
Triton
X-100, X-114, X-405, or X-45 Detergents
X
C2 H4 O2
Acetic acid-Fe-O- complex
during ESI with metal tips and acetic acid
X
+
[C2H4O]nH2O
PEG
Polyethylene glycol, ubiquitous polyether
X
X
D, K
+
Polypropylene glycol, ubiquitous polyether
X
X
D, K
X-100R, X-114R, X-405R, or X-45R Detergents
X
X
D, K
Polyethylene glycol, ubiquitous polyether
Didodecyl 3,3′-thiodipropionate oxidized to sulfone,
antioxidant
Distearyldimethylammonium chloride, catalyst,
personal care products additive
X
X
D, K
X
X
W
x
X
A, K, O
101 Detergents
Didodecyl 3,3′-thiodipropionate oxidized to
sulfoxide, antioxidant
Irganox 1076, antioxidant in synthetic polymers,
antioxidant
X
X
D, K
X
X
A, W
X
X
A, W
during ESI with metal tips and acetic acid
X
101R Detergents
X
[AB7+Na]
537.87901 [M6-6H+3Fe+O]
541.26209
541.39463
543.38674
547.33242
547.40269
550.62853
[A11B+K]
[A9B+H]
[C3H6O]nH2O
PPG
+
[C14H28O][C2H4O]n
Triton, reduced
+
[C2H4O]nH2O
PEG
C30H58O6S
DDTDP
C38H80NCl
DSDMA
[C15H24O][C2H4O]n
Triton
+
C30H58O5S
DDTDP
+
C35H62O3
Irganox
C2 H4 O2
Acetic acid-Fe-O- complex
[C15H30O][C2H4O]n
Triton, reduced
[AB7+Na]
[A12B+H]
[M+H]
[M-Cl]
+
+
551.35544
[AB7+Na]
553.38972
[M+Na]
553.45912
+
+
[M+Na]
[M66H+H2O+3Fe+O
+
555.88957
]
557.40239
[AB7+Na]
+
D, K
A, B, E, Y
A, B, E, Y
X
D, K
559.38406
[AB8+H]
+
+
563.37657
[A9B+Na]
568.13506
[M3+H]
569.31437
[A12B+Na]
571.35622
573.39971
577.12631
[M+H]
+
+
[AB8+H]
+
[M+H-CH4]
591.35864
PEG
VSLPR
Polyethylene glycol, ubiquitous polyether
X
X
D, K
Peptide
porcine trypsin
X
X
G
[C15H24O][C2H4O]n
Triton
101 Detergents
X
X
D, K
[C2H6SiO]8
Polysiloxane
Polysiloxane, (neutral methane loss from m/z 593)
X
X
L
D, K
+
[C2H4O]nH2O
PEG
Polyethylene glycol, ubiquitous polyether
X
X
D, K
+
[C14H28O][C2H4O]n
Triton, reduced
X-100R, X-114R, X-405R, or X-45R Detergents
X
X
D, K
+
[C2H4O]nH2O
PEG
Polyethylene glycol, ubiquitous polyether
X
X
D, K
[C2H6SiO]8
Polysiloxane
Polysiloxane, followed by m/z 610
X
X
A, L
+
[C15H24O][C2H4O]n
Triton
101 Detergents
X
X
D, K
+
+
C2 H4 O2
Acetic acid-Fe-O- complex
during ESI with metal tips and acetic acid
X
+
[C3H6O]nH2O
PPG
Polypropylene glycol, ubiquitous polyether
X
X
D, K
+
[C15H30O][C2H4O]n
Triton, reduced
101R Detergents
X
X
D, K
[C14H22O][C2H4O]n
Triton
X-100, X-114, X-405, or X-45 Detergents
X
X
D, K
X
H, I, J
603.41028
[AB9+H]
+
606.09149
[M3+K]
+
610.18416
[M+NH4]
+
613.34058
[A13B+Na]
615.40375
[M+H]
+
+
+
[A10B+Na]
+
+
C10H7NO3
4-HCCA
[C2H6SiO]8
Polysiloxane
[C2H4O]nH2O
PEG
C32H58N2O7S
CHAPS
[C15H24O][C2H4O]n
[C3H6O]nH2O
matrix cluster, trimer, potassiated
B, E, Y
Polysiloxane (see m/z 593)
X
X
L
Polyethylene glycol, ubiquitous polyether
3-[(3-Cholamidopropyl)dimethylammonio]-1propanesulfonate
X
X
D, K
X
X
E
Triton
101 Detergents
X
X
D, K
PPG
Polypropylene glycol, ubiquitous polyether
X
X
D, K
C3 H6 O2
Propionic acid Fe-O complex
during ESI with metal tips and acetic acid
X
+
[C14H22O][C2H4O]n
Triton
X-100, X-114, X-405, or X-45 Detergents
X
X
D, K
+
[C2H4O]nH2O
PEG
Polyethylene glycol, ubiquitous polyether
X
X
D, K
+
[C14H28O][C2H4O]n
Triton, reduced
X-100R, X-114R, X-405R, or X-45R Detergents
X
X
D, K
QTIASN
Peptide
Bovine trypsin
X
X
K
Polyethylene glycol, ubiquitous polyether
X
X
D, K
621.97291 [M6-6H+3Fe+O]
635.38485
4-HCCA
[C2H4O]nH2O
D, K
[A10B+H]
[AB9+Na]
[AB9+Na]
[M+H]
H, I, J
X
[AB8+Na]
633.32023
D, K
X
X
601.42861
631.43917
X
X
[A13B+H]
[A13B+K]
X
matrix cluster, trimer
X
597.90014 [M7-6H+3Fe+O]
629.31452
Polypropylene glycol, ubiquitous polyether
X-100, X-114, X-405, or X-45 Detergents
[M+H]
625.39222
PPG
Polypropylene glycol, ubiquitous polyether
[AB8+Na]
621.41844
[C3H6O]nH2O
C10H7NO3
D, K
PPG
[AB8+Na]
[AB9+H]
X
Triton
595.38166
617.42593
X
[C3H6O]nH2O
593.15761
599.43649
X-100, X-114, X-405, or X-45 Detergents
[C14H22O][C2H4O]n
[AB8+Na]
[A12B+K]
Triton
+
[A9B+K]
581.36601
587.41296
+
+
579.35051
585.28830
+
[C14H22O][C2H4O]n
+
[A14B+H]
+
[C2H4O]nH2O
PEG
Y
637.39237
[A10B+K]
+
[C3H6O]nH2O
PPG
Polypropylene glycol, ubiquitous polyether
X
X
D, K
[C15H24O][C2H4O]n
Triton
101 Detergents
X
X
D, K
[C15H30O][C2H4O]n
Triton, reduced
101R Detergents
X
X
D, K
GLTAER (from YLDGLTAER)
Peptide
keratin (human), ion source fragment
X
X
G, K
[C14H22O][C2H4O]n
Triton
X-100, X-114, X-405, or X-45 Detergents
X
X
D, K
[C2H6SiO]9
Polysiloxane
Polysiloxane, (neutral methane loss from m/z 667)
X
X
L
[C2H4O]nH2O
PEG
Polyethylene glycol, ubiquitous polyether
X
X
D, K
[C3H6O]nH2O
PPG
Polypropylene glycol, ubiquitous polyether
X
X
D, K
SGIQVR
Peptide
Bovine trypsin
X
X
K
[C15H24O][C2H4O]n
Triton
101 Detergents
X
X
D, K
[C2H6SiO]9
Polysiloxane
Polysiloxane, followed by m/z 684
X
X
L
X-100, X-114, X-405, or X-45 Detergents
X
X
D, K
639.40787
[AB9+Na]
+
645.45482
[AB9+Na]
+
646.35187
647.43649
[f+H]
+
[AB10+H]
+
+
651.14510
[M+H-CH4]
657.36680
[A14B+Na]
+
657.47836
[A11B+H]
+
659.38350
[M+H]
661.45214
667.17640
669.41844
+
[AB10+H]
[M+H]
+
[AB10+Na]
672.40390
[M+H]
+
672.40390
[M+H]
+
673.34073
+
[A14B+K]
+
+
+
675.46539
[AB10+Na]
679.41107
+
[A15B+H]
679.46030
[A11B+Na]
679.51166
[M+H]
683.43409
[AB10+Na]
684.20295
[M+NH4]
[C14H22O][C2H4O]n
Triton
TVSLPR
Peptide
porcine trypsin
X
X
K
TVSLPR
Peptide
porcine trypsin
X
X
K
[C2H4O]nH2O
PEG
Polyethylene glycol, ubiquitous polyether
X
X
D, K
[C14H28O][C2H4O]n
Triton, reduced
X-100R, X-114R, X-405R, or X-45R Detergents
X
X
D, K
[C2H4O]nH2O
PEG
Polyethylene glycol, ubiquitous polyether
X
X
D, K
+
[C3H6O]nH2O
PPG
X
X
D, K
C36H66N6O6
nylon
Polypropylene glycol, ubiquitous polyether
Cyclic oligomer of polyamide 66, (adipic
acid/hexylmethylene diamine condensation)
X
X
M
+
[C15H24O][C2H4O]n
Triton
101 Detergents
X
X
D, K
[C2H6SiO]9
Polysiloxane
Polysiloxane (see m/z 667)
X
X
L
101R Detergents
X
X
D, K
+
+
+
689.48104
[AB10+Na]
[C15H30O][C2H4O]n
Triton, reduced
691.46271
+
[C14H22O][C2H4O]n
Triton
X-100, X-114, X-405, or X-45 Detergents
X
X
D, K
+
[C3H6O]nH2O
PPG
Polypropylene glycol, ubiquitous polyether
X
X
D, K
Polyethylene glycol, ubiquitous polyether
X
X
D, K
keratin
X
X
E
695.43424
701.39301
704.38250
705.47836
[AB11+H]
[A11B+K]
[A15B+Na]
[M+H]
+
+
[AB11+H]
+
+
713.44465
[AB11+Na]
715.52022
+
717.36695
[A12B+H]
[A15B+K]
+
[C2H4O]nH2O
PEG
LDSELK
Peptide
[C15H24O][C2H4O]n
Triton
101 Detergents
X
X
D, K
[C14H22O][C2H4O]n
Triton
X-100, X-114, X-405, or X-45 Detergents
X
X
D, K
[C3H6O]nH2O
PPG
Polypropylene glycol, ubiquitous polyether
X
X
D, K
Polyethylene glycol, ubiquitous polyether
X
X
D, K
[C2H4O]nH2O
PEG
+
719.49160
[AB11+Na]
723.43728
[A16B+H]
+
725.16390
[M+H-CH4]
727.46030
+
732.46544
[AB11+Na]
[M+H]
+
+
+
733.50725
[AB11+Na]
735.48892
+
[AB12+H]
+
[C14H28O][C2H4O]n
Triton, reduced
[C2H4O]nH2O
PEG
X-100R, X-114R, X-405R, or X-45R Detergents
X
X
D, K
Polyethylene glycol, ubiquitous polyether
X
X
D, K
Polysiloxane, (neutral methane loss from m/z 741)
X
X
L
101 Detergents
X
X
D, K
bovine serum albumin (BSA)
X
X
E
101R Detergents
X
X
D, K
[C2H6SiO]10
Polysiloxane
[C15H24O][C2H4O]n
Triton
GLVLIAF
Peptide
[C15H30O][C2H4O]n
Triton, reduced
[C14H22O][C2H4O]n
Triton
X-100, X-114, X-405, or X-45 Detergents
X
X
D, K
Polypropylene glycol, ubiquitous polyether
X
X
D, K
Polysiloxane, followed by m/z 758
X
X
L
737.50217
[A12B+Na]
[C3H6O]nH2O
PPG
741.19520
[M+H]
+
[C2H6SiO]10
Polysiloxane
[M+H]
+
GPFPILV
Peptide
bovine casein alpha-S1
X
X
E
[M+H]
+
ATVSLPR
Peptide
porcine trypsin
X
X
G
742.44979
743.44101
+
745.41923
[A16B+Na]
[C2H4O]nH2O
PEG
Polyethylene glycol, ubiquitous polyether
X
X
D, K
749.50457
[AB12+H]
+
[C15H24O][C2H4O]n
Triton
101 Detergents
X
X
D, K
753.47610
[A12B+K]
+
[C3H6O]nH2O
PPG
Polypropylene glycol, ubiquitous polyether
X
X
D, K
[C14H22O][C2H4O]n
Triton
X-100, X-114, X-405, or X-45 Detergents
X
X
D, K
[C2H6SiO]10
Polysiloxane
Polysiloxane (see m/z 741)
X
X
L
PATLNSR
Peptide
porcine trypsin
X
X
G
[C2H4O]nH2O
PEG
Polyethylene glycol, ubiquitous polyether
X
X
D, K
X-100R, X-114R, X-405R, or X-45R Detergents
X
X
D, K
+
757.47087
[AB12+Na]
758.22175
+
758.41553
761.39316
[M+NH4]
[M+H]
+
[A16B+K]
+
+
763.51782
[AB12+Na]
767.46350
+
[A17B+H]
+
771.48652
[AB12+Na]
773.56209
+
[A13B+H]
+
777.53347
[AB12+Na]
779.51514
[AB13+H]
+
789.44544
[A17B+Na]
793.53079
+
795.54403
798.58785
[AB13+H]
[C2H4O]nH2O
PEG
Polyethylene glycol, ubiquitous polyether
X
X
D, K
[C15H24O][C2H4O]n
Triton
101 Detergents
X
X
D, K
[C3H6O]nH2O
PPG
Polypropylene glycol, ubiquitous polyether
X
X
D, K
[C15H30O][C2H4O]n
Triton, reduced
101R Detergents
X
X
D, K
[C14H22O][C2H4O]n
Triton
X-100, X-114, X-405, or X-45 Detergents
X
X
D, K
[C2H4O]nH2O
PEG
Polyethylene glycol, ubiquitous polyether
X
X
D, K
[C15H24O][C2H4O]n
Triton
101 Detergents
X
X
D, K
[C3H6O]nH2O
PPG
Polypropylene glycol, ubiquitous polyether
X
X
D, K
+
C24H38O4
Diisooctyl phthalate
Diisooctyl phthalate, plasticiser
X
X
A, C, E
+
[C14H22O][C2H4O]n
Triton
X-100, X-114, X-405, or X-45 Detergents
X
X
D, K
LSSPATLN
Peptide
porcine trypsin, truncated
X
X
E
801.49708
[AB13+Na]
802.43051
[M+H]
+
Triton, reduced
+
[A13B+Na]
[M2+NH4]
+
[C14H28O][C2H4O]n
+
Diisooctyl phthalate, plasticiser
X
X
Peptide
keratin (human)
X
X
G
Peptide
bovine trypsin
X
X
G, K
Polyethylene glycol, ubiquitous polyether
X
X
D, K
keratin (human)
X
X
G, K
X-100R, X-114R, X-405R, or X-45R Detergents
X
X
D, K
Peptide
keratin
X
X
E
803.54324
[M2+Na]
C24H38O4
Diisooctyl phthalate
804.40978
[M+H]
+
SEIDNVK
805.41626
[M+H]
+
SAASLNSR
805.41938
[A17B+K]
[C2H4O]nH2O
PEG
LAADDFR
Peptide
[C14H28O][C2H4O]n
Triton, reduced
LASYLDK
807.39954
807.54403
809.44035
[M+H]
+
+
[AB13+Na]
[M+H]
+
[C18H34O6][C2H4O]n
Tween
Tween 20
X
X
D, K
[C2H4O]nH2O
PEG
Polyethylene glycol, ubiquitous polyether
X
X
D, K
+
[C3H6O]nH2O
PPG
Polypropylene glycol, ubiquitous polyether
X
X
D, K
[C15H24O][C2H4O]n
Triton
101 Detergents
X
X
D, K
C24H38O4
Diisooctyl phthalate
Diisooctyl phthalate, plasticiser
X
X
A, K
[C15H30O][C2H4O]n
Triton, reduced
101R Detergents
X
X
D, K
[C14H22O][C2H4O]n
Triton
X-100, X-114, X-405, or X-45 Detergents
X
X
D, K
[M+H]
+
PGVVSLPR
Peptide
trypsin-like artefact
X
X
E
[M+H]
+
FASFIDK
Peptide
keratin (human)
X
X
E, G, K
[M+H]
+
PEIQNVK
Peptide
keratin (human)
X
X
G, K
[C3H6O]nH2O
PPG
Polypropylene glycol, ubiquitous polyether
X
X
D, K
X
G, K
[AB10+Na]
811.48971
[A18B+H]
815.51273
819.51718
[A13B+K]
[AB13+Na]
[M2+K]
[AB13+Na]
823.54135
[AB14+H]
827.42978
827.46214
831.60395
+
+
821.55968
824.49887
+
+
809.48691
811.51797
+
[A14B+H]
+
+
+
+
832.48870
[M+H]
833.47166
[A18B+Na]
837.55700
+
[AB14+H]
+
839.09742 [M4-2H+K+2Na]
842.50943
[M+H]
+
845.10543
[M4-3H+4Na]
845.52330
[AB14+Na]
848.49886
849.44559
[M+H]
+
+
[A18B+K]
+
+
+
SISISVAR
Peptide
keratin (human)
X
[C2H4O]nH2O
PEG
Polyethylene glycol, ubiquitous polyether
X
X
D, K
[C15H24O][C2H4O]n
Triton
101 Detergents
X
X
D, K
C10H7NO3
4-HCCA
matrix cluster
X
H, I, J
VATVSLPR
Peptide
porcine trypsin
X
E, G, K
matrix cluster
C10H7NO3
4-HCCA
[C14H22O][C2H4O]n
Triton
AFIDKVR
Peptide
[C2H4O]nH2O
PEG
[AB14+Na]
+
[C14H28O][C2H4O]n
Triton, reduced
853.51313
[AB11+Na]
+
[C18H34O6][C2H4O]n
Tween
853.58590
[A14B+Na]
+
[C3H6O]nH2O
PPG
851.57025
A, C, E
X
X
H, I, J
X-100, X-114, X-405, or X-45 Detergents
X
X
D, K
keratin (human)
X
X
G, K
Polyethylene glycol, ubiquitous polyether
X
X
D, K
X-100R, X-114R, X-405R, or X-45R Detergents
X
X
D, K
Tween 20
X
X
D, K
Polypropylene glycol, ubiquitous polyether
X
X
D, K
855.07136 [M4-2H+Na+2K]
+
855.51593
[A19B+H]
859.53895
[AB14+Na]
+
861.07937 [M4-3H+3Na+K]
863.47338
865.47780
[f+H]
+
[f+H]
+
[AB10+Na]
+
865.58590
[AB14+Na]
+
867.08737
[M4-4H+5Na]
867.56757
[AB15+H]
865.54951
869.55983
870.54073
871.04530
[A14B+K]
[M+H]
X
D, K
Triton
X
X
D, K
C10H7NO3
SFLINNR (from
THNLEPYFESFINNLR)
4-HCCA
matrix cluster
X
H, I, J
Peptide
keratin (human), ion source fragment
X
X
G, K
IEIATYR (from LALDIEIATYR)
Peptide
keratin (human), ion source fragment
X
X
G, K
[C22H42O6][C2H4O]n
Tween
Tween 40
X
X
D, K
[C15H30O][C2H4O]n
Triton, reduced
101R Detergents
X
X
D, K
X
H, I, J
X
D, K
[C3H6O]nH2O
PPG
Polypropylene glycol, ubiquitous polyether
X
X
D, K
VATVSLPR N-term. methylated
Peptide
porcine trypsin - methylated
X
X
J
X
H, I, J
877.49787
[A19B+Na]
+
+
[AB15+H]
+
+
883.51485
[M+H]
889.54951
[AB15+Na]
889.64582
[A15B+H]
+
+
+
891.56516
[AB10+Na]
893.47181
+
899.54214
X
101 Detergents
X
+
899.53089
Polyethylene glycol, ubiquitous polyether
X-100, X-114, X-405, or X-45 Detergents
[M+H]
897.53934
PEG
[C15H24O][C2H4O]n
Triton
[M+H]
895.59646
H, I, J
+
874.49926
893.58081
X
4-HCCA
+
[A19B+K]
[C2H4O]nH2O
matrix cluster
[C14H22O][C2H4O]n
871.49959
881.58322
4-HCCA
+
[M4-2H+3K]
[M+H]
+
+
C10H7NO3
C10H7NO3
+
881.47271
+
+
matrix cluster
C10H7NO3
4-HCCA
matrix cluster
QATVSLPR
Peptide
trypsin-like artefact
X
X
E
SLVNLGGSK
Peptide
keratin (human)
X
X
E, G, K
[C2H4O]nH2O
PEG
Polyethylene glycol, ubiquitous polyether
X
X
D, K
SLYGLGGSK
Peptide
keratin (human)
X
X
G, K
[C15H24O][C2H4O]n
Triton
101 Detergents
X
X
D, K
RVYVHPI
Peptide
Angiotensin standards
X
X
E
[C14H22O][C2H4O]n
Triton
X-100, X-114, X-405, or X-45 Detergents
X
X
D, K
[C3H6O]nH2O
PPG
Polypropylene glycol, ubiquitous polyether
X
X
D, K
[C24H44O6][C2H4O]n
Tween
Tween 80
X
X
D, K
[C2H4O]nH2O
PEG
Polyethylene glycol, ubiquitous polyether
X
X
D, K
[C24H46O6][C2H4O]n
Tween
Tween 60
X
X
D, K
X
D, K
[AB10+Na]
+
[AB15+Na]
+
[C14H28O][C2H4O]n
Triton, reduced
[AB12+Na]
+
[C18H34O6][C2H4O]n
Tween
Tween 20
X
X
D, K
VQTVSLPR
Peptide
trypsin-like artefact
X
X
E
[C2H4O]nH2O
PEG
Polyethylene glycol, ubiquitous polyether
X
X
D, K
[C15H24O][C2H4O]n
Triton
X
X
D, K
C48H88N8O8
nylon
101 Detergents
Cyclic oligomer of polyamide 66, (adipic
acid/hexylmethylene diamine condensation)
X
X
M
[M+H]
+
[A20B+H]
+
903.56516
[AB15+Na]
905.67979
[M+H]
+
+
X-100R, X-114R, X-405R, or X-45R Detergents
[M+H]
+
906.50434
[M+H]
+
909.57573
[AB11+Na]
+
[C22H42O6][C2H4O]n
909.61211
[AB15+Na]
+
[C15H30O][C2H4O]n
Triton, reduced
911.59378
+
[C14H22O][C2H4O]n
906.50434
911.62776
917.49920
[AB16+H]
[A15B+Na]
[M+H]
+
X
G, K
NKPGVYTK
Peptide
porcine trypsin
X
X
G, K
Tween
Tween 40
X
X
D, K
101R Detergents
X
X
D, K
Triton
X-100, X-114, X-405, or X-45 Detergents
X
X
D, K
[C3H6O]nH2O
PPG
Polypropylene glycol, ubiquitous polyether
X
X
D, K
RVYVHPF
Peptide
Angiotensin standards (bovine)
X
X
E
PEG
Polyethylene glycol, ubiquitous polyether
X
X
D, K
Triton
101 Detergents
X
X
D, K
+
[C3H6O]nH2O
PPG
Polypropylene glycol, ubiquitous polyether
X
X
D, K
Angiotensin standards (human)
X
X
E
+
RVYIHPF
Peptide
[AB16+Na]
+
[C14H22O][C2H4O]n
Triton
X-100, X-114, X-405, or X-45 Detergents
X
X
D, K
935.59138
[AB11+Na]
+
[C24H44O6][C2H4O]n
Tween
Tween 80
X
X
D, K
937.49802
[A20B+K]
[C2H4O]nH2O
PEG
Polyethylene glycol, ubiquitous polyether
X
X
D, K
[AB11+Na]
+
[C24H46O6][C2H4O]n
Tween
Tween 60
X
X
D, K
[AB16+Na]
+
[C14H28O][C2H4O]n
Triton, reduced
X-100R, X-114R, X-405R, or X-45R Detergents
X
X
D, K
[AB13+Na]
+
[C18H34O6][C2H4O]n
Tween
Tween 20
X
X
D, K
947.59138
[AB16+Na]
+
[C15H24O][C2H4O]n
Triton
101 Detergents
X
X
D, K
947.68768
+
Polypropylene glycol, ubiquitous polyether
X
X
D, K
933.57573
937.60703
939.62268
941.56556
[M+H]
X
[C2H4O]nH2O
[AB16+H]
931.51485
bovine trypsin
[C15H24O][C2H4O]n
[A20B+Na]
925.60943
[A15B+K]
+
Peptide
+
921.52409
927.60170
+
NKPGVYTK
+
[A16B+H]
+
[C3H6O]nH2O
PPG
YVNWIQQ
Peptide
trypsin-like artefact, truncated
X
X
E
[AB12+Na]
+
[C22H42O6][C2H4O]n
Tween
Tween 40
X
X
D, K
953.63833
[AB16+Na]
+
[C15H30O][C2H4O]n
Triton, reduced
101R Detergents
X
X
D, K
955.62000
[AB17+H]
+
[C14H22O][C2H4O]n
Triton
X-100, X-114, X-405, or X-45 Detergents
X
X
D, K
969.63565
[AB17+H]
+
[C15H24O][C2H4O]n
Triton
101 Detergents
X
X
D, K
969.66963
[A16B+Na]
[C3H6O]nH2O
PPG
Polypropylene glycol, ubiquitous polyether
X
X
D, K
IEISELNR
Peptide
keratin (human)
X
X
E, G, K
[C14H22O][C2H4O]n
Triton
X-100, X-114, X-405, or X-45 Detergents
X
X
D, K
950.47305
953.60194
973.53129
977.60194
979.50949
[M+H]
[M+H]
+
[AB17+Na]
[M+H]
+
+
+
979.61759
[AB12+Na]
+
981.63324
[AB12+Na]
+
GTSYPDVLK
Peptide
bovine trypsin
X
X
G, K
[C24H44O6][C2H4O]n
Tween
Tween 80
X
X
D, K
[C24H46O6][C2H4O]n
Tween
Tween 60
X
X
D, K
[AB17+Na]
+
[C14H28O][C2H4O]n
Triton, reduced
985.59177
[AB14+Na]
+
[C18H34O6][C2H4O]n
Tween
985.64356
+
[C3H6O]nH2O
983.64889
991.61759
[A16B+K]
+
994.15551
[AB17+Na]
[M5-H2O+
2H+3Na]
995.51966
[M+H]
+
997.62816
[AB13+Na]
+
997.66454
[AB17+Na]
+
999.64621
+
X
X
D, K
Tween 20
X
X
D, K
PPG
Polypropylene glycol, ubiquitous polyether
X
X
D, K
[C15H24O][C2H4O]n
Triton
101 Detergents
X
X
D, K
C10H7NO3
4-HCCA
matrix cluster
X
H, I, J
IKEWYEK
Peptide
keratin
X
X
E
Tween 40
X
X
D, K
101R Detergents
X
X
D, K
X-100, X-114, X-405, or X-45 Detergents
X
X
D, K
[C22H42O6][C2H4O]n
Tween
[C15H30O][C2H4O]n
Triton, reduced
[C14H22O][C2H4O]n
Triton
[M+H]
+
LQAEIEGLK
Peptide
keratin
X
X
E
[M+H]
+
LVVSTQTALA, C-terminus
Peptide
bovine serum albumin (BSA)
X
X
E
1003.55309
[M+H]
+
SEITELRR
Peptide
keratin
X
X
E
1005.72955
[A17B+H]
+
[C3H6O]nH2O
PPG
Polypropylene glycol, ubiquitous polyether
X
X
D, K
1013.66186
[AB18+H]
+
[C15H24O][C2H4O]n
Triton
101 Detergents
X
X
D, K
APILSDSSCK
Peptide
bovine trypsin
X
X
G, K
SIPYQVSLN
Peptide
trypsin-like artefact, truncated
X
X
E
[C14H22O][C2H4O]n
Triton
X-100, X-114, X-405, or X-45 Detergents
X
X
D, K
X
E
1000.56734
1002.58299
1020.50302
1020.53604
1021.62816
1023.47417
[AB18+H]
X-100R, X-114R, X-405R, or X-45R Detergents
[M+H]
+
[M+H]
+
[AB18+Na]
[M+H]
+
[M+H]
+
+
SSYPGQITGN
Peptide
trypsin-like artefact, truncated
X
NEQFISASK
Peptide
bovine trypsin
X
X
G, K
[AB13+Na]
+
[C24H44O6][C2H4O]n
Tween
Tween 80
X
X
D, K
[AB13+Na]
+
[C24H46O6][C2H4O]n
Tween
Tween 60
X
X
D, K
[AB18+Na]
+
[C14H28O][C2H4O]n
Triton, reduced
X-100R, X-114R, X-405R, or X-45R Detergents
X
X
D, K
1027.71149
[A17B+Na]
+
[C3H6O]nH2O
PPG
Polypropylene glycol, ubiquitous polyether
X
X
D, K
1029.61799
[AB15+Na]
+
[C18H34O6][C2H4O]n
Tween
Tween 20
X
X
D, K
VLDELTLTK
Peptide
keratin (human)
X
X
E, G, K
TLLEGEESR
Peptide
keratin (human)
X
X
E, G, K
[C15H24O][C2H4O]n
Triton
101 Detergents
X
X
D, K
C10H7NO3
4-HCCA
X
H, I, J
X
E
1023.51055
1023.64381
1025.65946
1027.67511
1031.59830
1033.51603
1035.64381
1036.08277
1036.53229
[M+H]
+
[M+H]
+
+
[AB18+Na]
[M5-2H2O+
4H+4Na+K]
[M+H]
+
IRDWYQR
Peptide
matrix cluster
keratin
X
1037.52620
[M+H]
+
1041.65437
[AB14+Na]
+
1041.69076
[AB18+Na]
+
1043.67243
+
1043.68543
[AB19+H]
[A17B+K]
+
1044.11395 [M5-2H+Na+2K]
1045.56365
1046.59528
1054.09334
1057.68808
1060.08789
1060.56331
1063.77141
[M+H]
1080.53201
1082.59931
1085.68059
1085.71697
D, K
Triton, reduced
X
D, K
[C14H22O][C2H4O]n
Triton
X-100, X-114, X-405, or X-45 Detergents
X
X
D, K
[C3H6O]nH2O
PPG
Polypropylene glycol, ubiquitous polyether
X
X
D, K
X
H, I, J
G, K
LKSAASLNSR
Peptide
bovine trypsin
X
X
G, K
C10H7NO3
4-HCCA
matrix cluster
X
H, I, J
[C15H24O][C2H4O]n
Triton
X
D, K
C10H7NO3
4-HCCA
matrix cluster, pentamer, triply potassiated
X
H, I, J
TLLDIDNTR
Peptide
keratin (human)
X
X
E, G, K
Polypropylene glycol, ubiquitous polyether
X
X
D, K
+
[M5-2H+3K]
+
+
[A18B+H]
+
1079.67002
X
X
X
[M+H]
1073.64420
X
101R Detergents
X
1065.49934
1071.70132
Tween 40
porcine trypsin
+
1071.60445
Tween
[C15H30O][C2H4O]n
Peptide
[M+H]
1069.68567
[C22H42O6][C2H4O]n
LSSPATLNSR
[M+H]
1067.67002
G, K
+
[AB19+H]
+
+
[AB19+Na]
[M5+
3H+2K+2Na]
[M+H]
X
matrix cluster
1064.60987
1066.60439
X
4-HCCA
1064.57349
1066.09590
keratin (human)
C10H7NO3
+
1065.65437
Peptide
+
[M+H]
[M5-H2O+
4H+4Na+K]
[M+H]
+
YLDGLTAER
+
101 Detergents
X
[C3H6O]nH2O
PPG
DIIRAVGAYS
Peptide
lysyl endopeptidase (Lys-C)
X
X
E
LASYLDKVR
Peptide
keratin (human)
X
X
G, K
STMQELNSR
Peptide
keratin
X
X
E
[C14H22O][C2H4O]n
Triton
X-100, X-114, X-405, or X-45 Detergents
X
X
D, K
C10H7NO3
4-HCCA
matrix cluster, pentamer, potassiated, sodiated
X
H, I, J
FAAFIDKVR
Peptide
keratin (human)
X
X
G, K
X
D, K
[AB14+Na]
+
[C24H44O6][C2H4O]n
Tween
Tween 80
X
[AB14+Na]
+
[C24H46O6][C2H4O]n
Tween
Tween 60
X
X
D, K
keratin (human)
X
X
G, K
X-100R, X-114R, X-405R, or X-45R Detergents
X
X
D, K
[M+H]
+
LAGLEEALQK
Peptide
[AB19+Na]
+
[C14H28O][C2H4O]n
Triton, reduced
[AB16+Na]
+
[C18H34O6][C2H4O]n
Tween
Tween 20
X
X
D, K
[AB19+Na]
+
[C15H24O][C2H4O]n
GNEQFISASK (from
LGEDNINVVEGNEQFISASK)
Triton
101 Detergents
X
X
D, K
Peptide
bovine trypsin, in source fragment
X
X
G, K
[f+H]
+
+
FASFIDKVR
Peptide
keratin (human)
X
X
G, K
[AB15+Na]
+
[C22H42O6][C2H4O]n
Tween
Tween 40
X
X
D, K
[AB19+Na]
+
[C15H30O][C2H4O]n
Triton, reduced
101R Detergents
X
X
D, K
[M+H]
+
[C3H6O]nH2O
PPG
Polypropylene glycol, ubiquitous polyether
X
X
[C14H22O][C2H4O]n
Triton
X-100, X-114, X-405, or X-45 Detergents
X
X
D, K
Peptide
keratin (human)
X
X
G, K
Peptide
porcine trypsin
X
X
G, K
[C15H24O][C2H4O]n
Triton
101 Detergents
X
X
D, K
[C3H6O]nH2O
PPG
Polypropylene glycol, ubiquitous polyether
X
X
D, K
DAEAWFNEK
Peptide
keratin (human)
X
X
G, K
X-100, X-114, X-405, or X-45 Detergents
X
X
D, K
X
G, K
1085.75336
[A18B+Na]
1087.69864
[AB20+H]
+
1090.53097
[M+H]
+
VTMQNLNDR
1091.54800
[M+H]
+
GNEQFINAAK
+
+
1101.71429
1101.72729
1109.48982
[AB20+H]
[A18B+K]
[M+H]
+
1109.68059
[AB20+Na]
1111.56048
[M+H]
1111.69624
[AB15+Na]
+
D, K
[C14H22O][C2H4O]n
Triton
VCNYVSWIK
Peptide
bovine trypsin
+
[C24H44O6][C2H4O]n
Tween
Tween 80
X
X
D, K
[AB15+Na]
+
[C24H46O6][C2H4O]n
Tween
Tween 60
X
X
D, K
[AB20+Na]
+
[C14H28O][C2H4O]n
Triton, reduced
X-100R, X-114R, X-405R, or X-45R Detergents
X
X
D, K
1117.67042
[AB17+Na]
+
[C18H34O6][C2H4O]n
Tween
Tween 20
X
X
D, K
1118.50860
[M+H]
+
HGNSHQGEPR
Peptide
keratin (human)
X
X
G, K
1121.58372
[M+H]
+
QEYEQLIAK
Peptide
keratin (human)
X
X
G, K
[C3H6O]nH2O
PPG
Polypropylene glycol, ubiquitous polyether
X
X
D, K
[C15H24O][C2H4O]n
Triton
101 Detergents
X
X
D, K
IITHPNFNGN
Peptide
porcine trypsin, methylated, truncated
X
X
E, J
X
E
1113.71189
1115.72754
1121.81328
1123.69624
1126.56399
1129.62117
1129.70680
1129.74319
1141.51941
1143.55031
+
[A19B+H]
+
[AB20+Na]
[M+H]
+
[M+H]
+
LSELEAALQR
Peptide
Keratin
X
[AB16+Na]
+
[C22H42O6][C2H4O]n
Tween
Tween 40
X
X
D, K
[AB20+Na]
+
[C15H30O][C2H4O]n
Triton, reduced
101R Detergents
X
X
D, K
DYQELMNTK
Peptide
Keratin
X
X
E
VCNYVSWIK (W - oxid.)
Peptide
bovine trypsin
X
X
G, K
[M+H]
+
[M+H]
+
1143.79522
[A19B+Na]
1153.57354
[M+H]
1155.72245
[AB16+Na]
1157.59093
+
[M+H]
+
+
+
+
+
1157.73810
[AB16+Na]
1159.76916
[A19B+K]
+
1161.69663
[AB18+Na]
+
[C3H6O]nH2O
PPG
Polypropylene glycol, ubiquitous polyether
X
X
D, K
SSGTSYPDVLK
Peptide
bovine trypsin
X
X
G, K
[C24H44O6][C2H4O]n
Tween
Tween 80
X
X
D, K
QGVDADINGLR
Peptide
keratin (human)
X
X
G, K
[C24H46O6][C2H4O]n
Tween
Tween 60
X
X
D, K
Polypropylene glycol, ubiquitous polyether
X
X
D, K
Tween 20
X
X
D, K
[C3H6O]nH2O
PPG
[C18H34O6][C2H4O]n
Tween
[M+H]
+
1168.58194
[M+H]
+
1173.73302
[AB17+Na]
1165.58478
1175.52238
1175.63404
1179.60043
1179.85514
LENEIQTYR
Peptide
keratin (human)
VCcamNYVSWIK
X
X
E, G, K
Peptide
bovine trypsin
X
G, K
[C22H42O6][C2H4O]n
Tween
Tween 40
X
X
D, K
[M+H]
+
MFCAGYLEGGK
Peptide
bovine trypsin
X
X
J
[M+H]
+
TLDNDIMLIK
Peptide
porcine trypsin
X
X
E, G, K
[M+H]
+
YEELQITAGR
Peptide
keratin (human)
X
X
E, G, K
Polypropylene glycol, ubiquitous polyether
X
X
D, K
[A20B+H]
+
+
[C3H6O]nH2O
PPG
1183.61574
[M+H]
+
NVEIDPEIQK
Peptide
keratin (human)
X
X
G, K
1190.60855
[M+H]
+
QVLDNLTMEK
Peptide
kereatin
X
X
E
[M+H]
+
MoxFCAGYLEGGK
Peptide
bovine trypsin
X
X
J
[M+H]
+
TLDNDIMoxLIK
Peptide
porcine trypsin
X
X
E, G, K
[M+H]
+
YEELQVTVGR
Peptide
keratin (human)
X
X
G, K
1191.51730
1191.62896
1193.61608
1199.74867
[AB17+Na]
1200.57177
[M+H]
1201.76432
[AB17+Na]
[A20B+Na]
1201.83709
1203.64019
1205.72285
[M+H]
[C24H44O6][C2H4O]n
Tween
Tween 80
X
X
D, K
VCcamNYVSWIK (W - oxid.)
Peptide
bovine trypsin
X
X
G, K
+
[C24H46O6][C2H4O]n
Tween
Tween 60
X
X
D, K
+
[C3H6O]nH2O
PPG
Polypropylene glycol, ubiquitous polyether
X
X
D, K
TLDNDIMLIR
Peptide
trypsin-like artefact
X
X
E
[C18H34O6][C2H4O]n
Tween
Tween 20
X
X
D, K
X
G, K
+
+
[AB19+Na]
1208.61574
[M+H]
+
1210.59501
[M+H]
+
[M+H]
+
1210.59501
+
+
+
1217.75923
[AB18+Na]
1217.81102
+
[A20B+K]
TAAENDFVTLK
Peptide
keratin (human)
X
SSGGTSYPDVLK
Peptide
keratin (human)
X
X
G, K
SSGGTSYPDVLK
Peptide
bovine trypsin
X
X
G, K
[C22H42O6][C2H4O]n
Tween
Tween 40
X
X
D, K
Polypropylene glycol, ubiquitous polyether
X
X
D, K
[C3H6O]nH2O
PPG
+
TLDNDIMoxLIR
Peptide
trypsin-like artefact
X
X
E
+
EGNEQFINAAK
Peptide
porcine trypsin
X
X
G, K
C10H7NO3
4-HCCA
X
H, I, J
X
X
E
1219.63510
[M+H]
1220.59059
1225.12537
[M+H]
[M6-2H2O+
4H+4Na+K]
1229.80022
[M2+H]
+
C32H58N2O7S
CHAPS
matrix cluster, hexamer, potassiated, sodiated
3-[(3-Cholamidopropyl)dimethylammonio]-1propanesulfonate
1232.54385
[M+H]
+
MFCcamAGYLEGGK
Peptide
bovine trypsin
X
X
J
[M+H]
+
SGGGGGGGLGSGGSIR
Peptide
keratin (human)
X
X
G, K
[M+H]
+
FSSSSGYGGGSSR
Peptide
keratin (human)
X
X
G, K
1232.59780
1235.52873
[AB18+Na]
+
1245.79053
[AB18+Na]
+
1248.53876
[M+H]
1243.77488
1249.74906
1251.70959
1254.60730
1261.78545
+
[AB20+Na]
[M+H]
+
[M+H]
+
[AB19+Na]
+
+
[C24H44O6][C2H4O]n
Tween
Tween 80
X
X
D, K
[C24H46O6][C2H4O]n
Tween
Tween 60
X
X
D, K
MoxFCcamAGYLEGGK
Peptide
bovine trypsin
X
X
J
[C18H34O6][C2H4O]n
Tween
Tween 20
X
X
D, K
YIPIQYVLSR
Peptide
bovine casein alpha-S1
X
X
E
GFSSGSAVVSGGSR
Peptide
keratin (human)
X
X
G, K
[C22H42O6][C2H4O]n
Tween
Tween 40
X
X
D, K
1262.59714
[M+H]
+
SLLEGEGSSGGGGR
Peptide
keratin
X
X
E
1262.75793
[M+H]
+
LLHGVATVSLPR
Peptide
trypsin-like artefact
X
X
E
[M+H]
+
TNAENEFVTIK
Peptide
keratin (human)
X
X
G, K
[M+H]
+
YLGYLEQLLR
Peptide
bovine casein alpha-S1
X
X
E
[M+H]
+
SDQSRLDSELK
Peptide
keratin (human)
X
X
G, K
1277.70998
[M+H]
+
LALDIEIATYR
Peptide
keratin (human)
X
X
E, G, K
1278.58553
[M+H]
+
GSCcamGIGGGIGGGSSR
Peptide
keratin
X
X
E
[M+H]
+
YEQLAEQNRK
Peptide
keratin (human)
X
X
G, K
[M+H]
+
1265.63721
1267.70450
1277.63319
1278.64369
1282.66912
1287.80110
1289.81675
DRVYVHPFHL
Peptide
Angiotensin standards (bovine)
X
X
E
[AB19+Na]
+
[C24H44O6][C2H4O]n
Tween
Tween 80
X
X
D, K
[AB19+Na]
+
[C24H46O6][C2H4O]n
Tween
Tween 60
X
X
D, K
[AB21+Na]
+
X
D, K
[C18H34O6][C2H4O]n
Tween
Tween 20
X
[M+H]
+
DRVYIHPFHL
Peptide
Angiotensin standards (human)
X
X
E
[M+H]
+
ALEEANADLEVK
Peptide
keratin
X
X
E
[M+H]
+
NSKIEISELNR
Peptide
keratin (human)
X
X
G, K
[M+H]
+
SLDLDSIIAEVK
Peptide
keratin (human)
X
X
E, G, K
1305.71613
[M+H]
+
1305.81166
[AB20+Na]
1307.67764
[M+H]
1293.77528
1296.68477
1301.65834
1302.70121
1302.71512
HLVDEPQNLIK
Peptide
bovine serum albumin (BSA)
X
X
E
[C22H42O6][C2H4O]n
Tween
Tween 40
X
X
D, K
+
IKFEMEQNLR
Peptide
keratin (human)
X
X
E, G, K
[M+H]
+
VEGNEQFISASK
Peptide
bovine trypsin
X
X
G, K
[M+H]
+
NKYEDEINKR
Peptide
keratin (human)
X
X
G, K
1315.68523
[M+H]
+
DQIVDLTVGNNK
Peptide
keratin
X
X
E
1316.72425
[M+H]
+
TLDNDIMLIRL
Peptide
trypsin-like artefact
X
X
E
1308.64302
1308.65426
+
[M+H]
+
HGGGGGGFGGGGFGSR
Peptide
keratin (human)
X
X
G, K
1323.67255
[M+H]
+
IKFEMoxEQNLR
Peptide
keratin (human)
X
X
G, K
1329.63933
[M+H]
+
NVQDAIADAEQR
Peptide
keratin (human)
X
X
G, K
[C24H44O6][C2H4O]n
Tween
Tween 80
X
X
D, K
TLDNDIMoxLIRL
Peptide
trypsin-like artefact
X
X
E
[C24H46O6][C2H4O]n
Tween
Tween 60
X
X
D, K
TAAENDFVTLKK
Peptide
keratin (human)
X
X
G, K
[C18H34O6][C2H4O]n
Tween
Tween 20
X
X
D, K
SKAEAESLYQSK
Peptide
keratin
X
X
E
ASLEAAIADAEQR
Peptide
keratin
X
X
E
1320.58283
1331.82731
1332.71917
1333.84296
1336.71071
[AB20+Na]
[M+H]
+
[AB20+Na]
[M+H]
+
+
1337.80149
[AB22+Na]
1340.66924
[M+H]
+
[M+H]
+
1344.67539
+
+
+
[C22H42O6][C2H4O]n
Tween
Tween 40
X
X
D, K
[M+H]
+
IGLGGRGGSGGSYGR
Peptide
keratin
X
X
E
1357.69579
[M+H]
+
LNDLEDALQQAK
Peptide
keratin (human)
X
X
E, G, K
1357.71825
[M+H]
+
QSVEADINGLRR
Peptide
keratin (human)
X
X
G, K
[M+H]
+
SQYEQLAEQNR
Peptide
keratin (human)
X
X
G, K
[M+H]
+
RISNSTSPTSFVA
Peptide
lysyl endopeptidase (Lys-C)
X
X
E
[M+H]
+
VFTSWTGGGAAASR
Peptide
lysyl endopeptidase (Lys-C)
X
X
E
[M+H]
+
LNDLEEALQQAK
Peptide
keratin (human)
X
X
E, G, K
[M+H]
+
X
G
1349.83788
1350.68729
1365.63933
1366.69612
1367.67024
1371.71144
1374.69334
1375.85353
1377.86918
1381.64817
1381.82771
[AB21+Na]
DLNMDNIVAEIK
Peptide
keratin (human)
X
[AB21+Na]
+
[C24H44O6][C2H4O]n
Tween
Tween 80
X
X
D, K
[AB21+Na]
+
[C24H46O6][C2H4O]n
Tween
Tween 60
X
X
D, K
ALEESNYELEGK
Peptide
keratin (human)
X
X
E, G
[M+H]
+
[AB23+Na]
+
[C18H34O6][C2H4O]n
Tween
Tween 20
X
X
D, K
1383.69031
[M+H]
+
SLNNQFASFIDK
Peptide
keratin (human)
X
X
E, G
1384.72999
[M+H]
+
FFVAPFPEVFGK
Peptide
bovine casein alpha-S1
X
X
E
[M+H]
+
QSLEASLAETEGR
Peptide
keratin
X
X
E
[M+H]
+
TNAENEFVTIKK
Peptide
keratin (human)
X
X
E, G
[C22H42O6][C2H4O]n
Tween
Tween 40
X
X
D, K
TVMENFVAFVDK
PYFESFINNLR (from
THNLEPYFESFINNLR)
Peptide
bovine serum albumin (BSA)
X
X
E
Peptide
keratin (human), ion-source fragment
X
X
G, K
1390.68087
1393.73217
1393.86409
[AB22+Na]
+
1399.69262
[M+H]
1399.70048
+
[f+H]
+
[M+H]
+
VDALNDEINFLR
Peptide
keratin
X
X
1419.74783
[M+H]
+
LEGLTDEINFLR
Peptide
keratin
X
X
E
1419.79544
[M+H]
+
LGLDIEIATYRR
Peptide
keratin (human)
X
X
G
1419.87974
[AB22+Na]
+
[C24H44O6][C2H4O]n
Tween
Tween 80
X
X
D, K
[AB22+Na]
+
[C24H46O6][C2H4O]n
Tween
Tween 60
X
X
D, K
AAKIITHPNFNGN
Peptide
porcine trypsin, methylated
X
X
J
1418.72742
1421.89539
1424.76448
1425.85392
[M+H]
+
[AB24+Na]
1433.72056
[M+H]
+
1434.76996
[M+H]
+
+
+
E
[C18H34O6][C2H4O]n
Tween
Tween 20
X
X
D, K
LQGIVSWGSGCAQK
Peptide
bovine trypsin
X
X
G
IRLENEIQTYR
Peptide
keratin (human)
X
X
G
[C22H42O6][C2H4O]n
Tween
Tween 40
X
X
D, K
[M+H]
+
NNQFASFIDKVR
Peptide
keratin (human)
X
X
G
[M+H]
+
RHPEYAVSVLLR
Peptide
bovine serum albumin (BSA)
X
X
E
1442.80019
[M+H]
+
LPDIFEAQIAGLR
Peptide
keratin
X
X
E
1443.64204
[M+H]
+
YICcamDNQDTISSK
Peptide
bovine serum albumin (BSA)
X
X
E
1447.77510
[M+H]
+
Peptide
keratin (human)
X
X
G
1449.71548
[M+H]
+
AIGGGLSSVGGGSSTIK
LQGIVSWGSGCAQK (W - oxid.
I)
Peptide
bovine trypsin
X
X
G
[M+H]
+
EVTINQSLLAPLR
Peptide
keratin
X
X
E
[C24H44O6][C2H4O]n
LQGIVSWGSGCAQK (W - oxid.
II)
Tween
Tween 80
X
X
D, K
Peptide
bovine trypsin
X
X
G
X
D, K
1437.89031
1438.74374
1439.81176
1453.83731
[AB23+Na]
1463.90596
[AB23+Na]
1465.71039
[M+H]
+
+
1465.92161
[AB23+Na]
+
1469.88014
[AB25+Na]
+
[C24H46O6][C2H4O]n
Tween
Tween 60
X
[C18H34O6][C2H4O]n
Tween
Tween 20
X
X
D, K
[M+H]
+
WELLQQVDTSTR
Peptide
keratin (human)
X
X
E, G
[M+H]
+
FLEQQNQVLQTK
Peptide
keratin (human)
X
X
E, G
[M+H]
+
FLEQQNKVLETK
Peptide
keratin
X
X
E
1479.79544
[M+H]
+
LGEYGFQNALIVR
Peptide
bovine serum albumin (BSA)
X
X
E
1481.91652
[AB24+Na]
[C22H42O6][C2H4O]n
Tween
Tween 40
X
X
D, K
1490.74203
[M+H]
+
LQGIVSWGSGCcamAQK
Peptide
bovine trypsin
X
X
G
[M+H]
+
WELLQQVDTSTR (W - oxid. I)
Peptide
keratin (human)
X
X
G
[M+H]
+
FYAPELLYYANK
Peptide
bovine serum albumin (BSA)
X
X
E
[M+H]
+
DSCQGDSGGPVVCSGK ox. S-S
Peptide
porcine trypsin
X
X
J
1475.74888
1475.78527
1476.80567
1491.74380
1491.75185
1493.59953
+
bond
1493.73430
[M+H]
+
SQYEQLAEQNRK
Peptide
keratin (human)
X
X
E, G
1495.61518
[M+H]
+
DSCQGDSGGPVVCSGK
Peptide
bovine trypsin
X
X
G
[M+H]
+
1507.73872
1507.93217
1509.94782
WELLQQVDTSTR (W - oxid. II)
Peptide
keratin (human)
X
X
G
[AB24+Na]
+
[C24H44O6][C2H4O]n
Tween
Tween 80
X
X
D, K
[AB24+Na]
+
[C24H46O6][C2H4O]n
Tween
Tween 60
X
X
D, K
[AB26+Na]
+
[C18H34O6][C2H4O]n
Tween
Tween 20
X
X
D, K
NVVEGNEQFISASK
Peptide
bovine trypsin
X
X
G
LQGIVSWoxGSGCcamAQK
Peptide
bovine trypsin
X
X
G
[C22H42O6][C2H4O]n
SGGGGGGGGCcamGGGGGVSS
LR
Tween
Tween 40
X
X
D, K
Peptide
keratin
X
X
E
[AB25+Na]
+
[C24H44O6][C2H4O]n
Tween
Tween 80
X
X
D, K
[AB25+Na]
+
[C24H46O6][C2H4O]n
Tween
Tween 60
X
X
D, K
1557.93257
[AB27+Na]
+
1566.73944
[M+H]
+
1567.74274
[M+H]
+
1513.90635
1521.75436
[M+H]
+
1522.73186
[M+H]
+
1525.94274
[AB25+Na]
1549.67720
[M+H]
1551.95839
1553.97404
1569.96895
1585.75840
+
[AB26+Na]
[M+H]
+
+
+
1595.98460
[AB26+Na]
+
1598.00025
[AB26+Na]
+
1599.83368
1601.95878
1613.99517
+
D, K
X
E, G
DAFLGSFLYEYSR
Peptide
bovine serum albumin (BSA)
X
X
E
[C22H42O6][C2H4O]n
Tween
Tween 40
X
X
D, K
VQALEEANNDLENK
Peptide
keratin (human)
X
X
E, G
[C24H44O6][C2H4O]n
Tween
Tween 80
X
X
D, K
[C24H46O6][C2H4O]n
Tween
Tween 60
X
X
D, K
X
X
E
[AB28+Na]
[C18H34O6][C2H4O]n
Tween
Tween 20
X
X
D, K
[AB27+Na]
+
[C22H42O6][C2H4O]n
Tween
Tween 40
X
X
D, K
EQFINAAKIITHPN
Peptide
porcine trypsin, methylated
X
X
J
X
G
[M+H]
1640.01082
[AB27+Na]
1657.79287
X
X
keratin
1638.76566
1645.98500
X
porcine trypsin, truncated
Peptide
+
1642.02647
Tween 20
NKLNDLEDALQQAK
[M+H]
1639.93775
Tween
Peptide
+
[M+H]
+
1623.88532
[C18H34O6][C2H4O]n
LGEHNIDVLEGNEQ
+
+
SLNNQFASFIDKVR
Peptide
keratin (human)
X
[C24H44O6][C2H4O]n
Tween
Tween 80
X
X
D, K
KVPQVSTPTLVEVSR
Peptide
bovine serum albumin (BSA)
X
X
E
[AB27+Na]
+
[C24H46O6][C2H4O]n
Tween
Tween 60
X
X
D, K
[AB29+Na]
+
[C18H34O6][C2H4O]n
Tween
Tween 20
X
X
D, K
keratin (human)
X
X
E, G
[M+H]
[M+H]
+
SGGGFSSGSAGIINYQR
Peptide
1658.02138
Tween
Tween 40
X
X
D, K
TKPSQARGFHPRAGR
Peptide
keratin (human)
X
X
G
LGEDNINVVEGNEQF
Peptide
bovine trypsin
X
X
J
[AB28+Na]
+
[C24H44O6][C2H4O]n
Tween
Tween 80
X
X
D, K
[AB28+Na]
+
[C24H46O6][C2H4O]n
Tween
Tween 60
X
X
D, K
SLVNLGGSKSISISVAR
Peptide
keratin (human)
X
X
G
[C18H34O6][C2H4O]n
Tween
Tween 20
X
X
D, K
1665.90443
[M+H]
+
1676.77623
[M+H]
+
1684.03703
1686.05268
1687.97011
+
[C22H42O6][C2H4O]n
[AB28+Na]
[M+H]
+
[AB30+Na]
+
1702.04760
[AB29+Na]
+
[C22H42O6][C2H4O]n
Tween
Tween 40
X
X
D, K
1707.77214
[M+H]
+
GSLGGGFSSGGFSGGSFSR
Peptide
keratin (human)
X
X
E, G
1708.71325
[M+H]
+
FSSCGGGGGSFGAGGGFGSR
Peptide
keratin (human)
X
X
G
[M+H]
+
LGEHNIDVLEGNEQF
Peptide
porcine trypsin, truncated
X
X
E, G
[M+H]
+
QISNLQQSISDAEQR
Peptide
keratin (human)
X
X
E, G
1725.86287
[M+H]
+
VCNYVSWIKQTIASN
Peptide
bovine trypsin
X
X
G
1728.06325
[AB29+Na]
+
[C24H44O6][C2H4O]n
Tween
Tween 80
X
X
D, K
1730.07890
[AB29+Na]
+
[C24H46O6][C2H4O]n
Tween
Tween 60
X
X
D, K
[AB31+Na]
+
[C18H34O6][C2H4O]n
Tween
Tween 20
X
X
D, K
NNLEPILEGYISNLR
Peptide
keratin (human)
X
X
G
[C22H42O6][C2H4O]n
Tween
Tween 40
X
X
D, K
X
G
1690.01121
1713.80785
1716.85112
1734.03743
1744.92283
1746.07381
[M+H]
+
[AB30+Na]
1757.85270
[M+H]
+
1765.73471
[M+H]
+
+
VCNYVSWIKQTIASN (W - oxid.)
FSSCcamGGGGGSFGAGGGFGS
R
Peptide
bovine trypsin
X
Peptide
keratin (human)
X
X
E, G
[AB30+Na]
+
[C24H44O6][C2H4O]n
Tween
Tween 80
X
X
D, K
1774.10511
[AB30+Na]
+
Tween
Tween 60
X
X
D, K
1774.85026
[M+H]
+
[C24H46O6][C2H4O]n
IVGGYTCGANTVPY & CLK via
S-S bond
Peptide
bovine trypsin
X
X
J
[M+H]
+
1772.08946
1774.89700
NIDVLEGNEQFINAAK
Peptide
porcine trypsin
X
X
G
[C18H34O6][C2H4O]n
Tween
Tween 20
X
X
D, K
[C22H42O6][C2H4O]n
GGSGGSYGGGGSGGGYGGGS
GSR
Tween
Tween 40
X
X
D, K
Peptide
keratin (human)
X
X
E, G
1778.06364
[AB32+Na]
+
1790.10003
[AB31+Na]
+
1791.72772
[M+H]
+
[M+H]
+
LEAELGNMQGLVEDFK
Peptide
keratin
X
X
E
[M+H]
+
NVQALEIELQSQLALK
Peptide
keratin
X
X
E
1792.87858
1797.01165
[AB31+Na]
+
1818.13133
[AB31+Na]
+
1830.84056
[M+H]
1816.11568
+
+
[C24H44O6][C2H4O]n
Tween
Tween 80
X
X
D, K
[C24H46O6][C2H4O]n
Tween
Tween 60
X
X
D, K
SDQYGRVFTSWTGGGAAA
Peptide
lysyl endopeptidase (Lys-C)
X
X
E
[C22H42O6][C2H4O]n
Tween
Tween 40
X
X
D, K
[M+H]
+
HGVQELEIELQSQLSK
Peptide
keratin
X
X
E
[M+H]
+
SISISVAGGGGGFGAAGGFGGR
Peptide
keratin (human)
X
X
G
[M+H]
+
SNMDNMFESYINNLR
Peptide
keratin
X
X
E
1851.92693
[M+H]
+
TLNDMRQEYEQLIAK
Peptide
keratin
X
X
E
1860.14189
[AB32+Na]
+
[C24H44O6][C2H4O]n
Tween
Tween 80
X
X
D, K
1862.15754
[AB32+Na]
+
[C24H46O6][C2H4O]n
Tween
Tween 60
X
X
D, K
LGEHNIDVLEGNEQFIN
TLDNDIMLIKLSSPATLN, K
methylated
Peptide
porcine trypsin, truncated, methylated
X
X
E, J
Peptide
porcine trypsin, methylated
X
X
J
1834.12624
1837.96542
1838.91439
1847.80510
[AB32+Na]
1940.93485
[M+H]
+
1987.07801
[M+H]
+
[M+H]
+
THNLEPYFESFINNLR
Peptide
keratin (human)
X
X
E, K
[M+H]
+
keratin (human)
X
X
G
[M+H]
SSGGSSSVKFVSTTYSGVTR
TLDNDIMoxLIKLSSPATLN, K
methylated
Peptide
+
Peptide
porcine trypsin, methylated
X
X
J
[M+H]
+
SSGGSSSVRFVSTTYSGVTR
Peptide
keratin (human)
X
X
G
[M+H]
+
RVLGQLHGGPSSCcamSATGTNR
Peptide
lysyl endopeptidase (Lys-C)
X
X
E
[M+H]
+
AETECcamQNTEYQQLLDIK
Peptide
keratin
X
X
E
[M+H]
+
LGEHNIDVLEGNEQFINAA
Peptide
porcine trypsin, truncated
X
X
E
[M+H]
+
ELQSQISDTSVVLSMDNSR
Peptide
keratin
X
X
E
[M+H]
+
THNLEPYFESFINNLRR
Peptide
keratin (human)
X
X
K
[M+H]
+
IITHPNFNGNTLDNDIMLI
Peptide
trypsin-like artefact, truncated
X
X
E
[M+H]
+
LGEDNINVVEGNEQFISASK
Peptide
bovine trypsin
X
X
G
[M+H]
+
SDLEMQYETLQEELMALK
Peptide
keratin
X
X
E
[M+H]
+
NKLNDLEDALQQAKEDLAR
LGEDNINVVEGNEQFISASK
sodiated
MFCAGYLEGGK &
APILSDSSCK via S-S bond
Peptide
keratin
X
X
E
Peptide
bovine trypsin
X
X
G, K
Peptide
bovine trypsin
X
X
J
SAYPGQITSNMFCAGYLEGGK
LGEDNINVVEGNEQFISASK
potassiated
Peptide
bovine trypsin
X
X
G, K
Peptide
bovine trypsin
X
X
G, K
1993.97666
1993.98253
2003.07293
2021.98868
2055.01485
2082.96483
2083.00908
2109.01285
2150.07777
2155.08522
2163.05642
2171.02466
2184.12551
2185.03837
[M+Na]
2193.00248
[M+H]
+
+
+
2193.99436
[M+K]
2201.01231
[M+H]
+
MoxFCAGYLEGGK &
APILSDSSCK via S-S bond
Peptide
bovine trypsin
X
X
J
[M+H]
+
SAYPGQITSNMoxFCAGYLEGGK
Peptide
bovine trypsin
X
X
G, K
[M+H]
+
porcine trypsin
X
X
G, K
2225.11969
[M+H]
Peptide
porcine trypsin
X
X
G, K
2225.15608
[f+H]
Peptide
bovine trypsin, ion source fragment
X
X
G, K
2239.13534
[M+H]
+
LGEHNIDVLEGNEQFINAAK
LGEHNIDVLEGNEQFINAAK, K
part. methylated
SIVHPSYNSNTLNNDIMoxLIK [CH3SOH]
LGEHNIDVLEGNEQFINAAK, K
methylated
Peptide
+
Peptide
porcine trypsin
X
X
G, K
2240.16966
[M+H]
+
Peptide
keratin
X
X
E
2251.01582
[M+H]
+
Peptide
bovine trypsin
X
X
G
2267.01074
[M+H]
+
ADLEFQIESLTEELAYLKK
SAYPGQITSNMFCcamAGYLEGG
K
SAYPGQITSNMoxFCcamAGYLE
GGK
Peptide
bovine trypsin
X
X
G
[M+H]
+
SIVHPSYNSNTLNNDIMLIK
Peptide
bovine trypsin
X
X
G, K
2283.18018
[M+H]
+
IITHPNFNGNTLDNDIMLIK
Peptide
bovine trypsin
X
X
G, K
2283.18018
[M+H]
+
IITHPNFNGNTLDNDIMLIK
Peptide
porcine trypsin
X
X
G, K
2286.12484
[M+H]
+
Peptide
keratin (human)
X
X
G
2289.15437
[M+H]
+
Peptide
bovine trypsin
X
X
G, K
2295.14139
[M+Na]
Peptide
bovine trypsin
X
X
G, K
2297.19584
[M+H]
+
Peptide
porcine trypsin, methylated
X
X
J
2305.14928
[M+H]
+
Peptide
bovine trypsin
X
X
G, K
2311.13631
[M+Na]
Peptide
bovine trypsin
X
X
G, K
2321.20707
[M+H]
+
AEAESLYQSKYEELQITAGR
SIVHPSYNSNTLNNDIMoxLIK (M oxid.)
SIVHPSYNSNTLNNDIMLIK
sodiated
IITHPNFNGNTLDNDIMLIK, K
part. methylated
SIVHPSYNSNTLNNDIMoxoxLIK
(M - 2 oxid.)
SIVHPSYNSNTLNNDIMoxLIK (M oxid.) sodiated
LQGIVSWGSGCAQKNKPGVYT
K
2329.17425
[M+H]
+
2343.18901
[M+Na]
2353.19690
[M+H]
+
2367.26267
[M+H]
+
2375.17884
[M+Na]
2383.95186
[M+H]
+
[M+H]
+
2208.99740
2209.98927
2211.10404
2273.15944
2400.27441
[M+H]
+
+
+
+
+
+
Peptide
bovine trypsin
X
X
G, K
QISNLQQSISDAEQRGENALK
LQGIVSWGSGCAQKNKPGVYT
K sodiated
LQGIVSWGSGCAQKNKPGVYT
K (W - oxid.)
Peptide
keratin
X
X
E
Peptide
bovine trypsin
X
X
G, K
Peptide
bovine trypsin
X
X
G, K
NQILNLTTDNANILLQIDNAR
LQGIVSWGSGCAQKNKPGVYT
K (W - oxid.) sodiated
GGGGGGYGSGGSSYGSGGGS
YGSGGGGGGGR
Peptide
keratin (human)
X
X
G
Peptide
bovine trypsin
X
X
G, K
Peptide
keratin (human)
X
X
G
IIKHPNYSSWTLNNDIMLIK
Peptide
bovine trypsin
X
X
G, K
AAFGGSGGRGSSSGGGYSSGS
SSYGSGGR
[M+H]
+
2501.25182
[M+H]
+
2510.13177
[M+H]
+
2514.33847
[M+H]
+
SIVHPSYNSNTLNNDIMLIKLK
2530.33339
[M+H]
+
2550.23269
[M+H]
+
2552.24834
[M+H]
+
2564.18093
[M+H]
+
Peptide
keratin (human)
X
X
G
Peptide
keratin (human)
X
X
G
Peptide
keratin (human)
X
X
E, G
Peptide
bovine trypsin
X
X
G, K
SIVHPSYNSNTLNNDIMoxLIKLK
VASISLPTSCASAGTQCLISGWG
NTK, -S-S-bond
VASISLPTSCASAGTQCLISGWG
NTK
SGSHFCGGSLINSQWVVSAAHC
YK, -S-S- bond
Peptide
bovine trypsin
X
X
G, K
Peptide
bovine trypsin
X
X
J
Peptide
bovine trypsin
X
X
J
Peptide
porcine trypsin, methylated
X
X
J
[M+H]
+
EVTQLRHGVQELEIELQSQLSK
Peptide
keratin
X
X
E
2566.27838
[M+H]
+
Peptide
keratin (human)
X
X
G
2581.19473
[M+H]
+
Peptide
keratin
X
X
E
2612.18093
[M+H]
+
Peptide
bovine trypsin
X
X
J
2613.34938
[M+H]
+
Peptide
bovine trypsin
X
X
J
2614.19658
[M+H]
+
Peptide
bovine trypsin
X
X
J
2666.29127
[M+H]
+
Peptide
bovine trypsin
X
X
J
2670.37084
[M+H]
+
Peptide
bovine trypsin
X
X
J
2705.16112
[M+H]
+
Peptide
keratin
X
X
E
2707.41621
[M+H]
+
Peptide
porcine trypsin, methylated
X
X
J
2720.36337
[M+H]
+
Peptide
porcine trypsin, methylated
X
X
J
2728.23951
[M+H]
+
Peptide
bovine trypsin
X
X
J
2746.41925
[M+H]
+
SKEEAEALYHSKYEELQVTVGR
FSGECcamAPNVSVSVSTSHTTIS
GGGSR
SGYHFCGGSLINSQWVVSAAHC
YK, -S-S- bond
NKPGVYTKVCNYVSWIKQTIAS
N
SGYHFCGGSLINSQWVVSAAHC
YK
VASISLPTSCcamASAGTQCcamLIS
GWGNTK
NKPGVYTKVCcamNYVSWIKQTIA
SN
GGGGSFGYSYGGGSGGGFSAS
SLGGGFGGGSR
IQVRLGEHNIDVLEGNEQFINAA
K
IVGGYTCAAN &
TKSSGSSYPSLLQCLK, via S-S
bond
SGYHFCcamGGSLINSQWVVSAA
HCcamYK
YCcamVQLSQIQAQISALEEQLQQ
IR
Peptide
keratin
X
X
E
Peptide
porcine trypsin, methylated
X
X
J
Peptide
porcine trypsin, methylated
X
X
J
Peptide
keratin
X
X
E
2501.06722
2564.36786
2748.39467
[M+H]
+
2807.31407
[M+H]
+
2872.39278
[M+H]
+
SKAEAESLYQSKYEELQITAGR
EIETYHNLLEGGQEDFESSGAG
K
IVGGYTCAAN &
TKSSGSSYPSLLQCLK, via S-S bond,
N-term. Methyl.
SGSHFCGGSLINSQWVVSAAHC
YKSR, -S-S- bond
NVSTGDVNVEMNAAPGVDLTQL
LNNMR
2902.41052
[M+H]
+
2904.38261
[M+H]
+
2914.50576
[M+H]
+
2932.51632
[M+H]
+
3211.47446
[M+H]
+
3223.28159
[M+H]
+
3227.46937
[M+H]
+
3312.30814
[M+H]
+
3337.73214
[M+H]
+
3346.68149
[M+H]
+
3353.72706
[M+H]
+
NYSPYYNTIDDLKDQIVDLTVGN
NK
NVSTGDVNVEMoxNAAPGVDLT
QLLNNMoxR
LGEHNIDVLEGNEQFINAAKIITH
PN, K methylated
FLEQQNQVLQTKWELLQQVDTS
TR
SAYPGQITSNMFCAGYLEGGK
& APILSDSSCK via S-S bond
GGSGGSHGGGSGFGGESGGS
YGGGEEASGSGGGYGGGSGK
SAYPGQITSNMoxFCAGYLEGGK
& APILSDSSCK via S-S bond
GSYGSGGSSYGSGGGSYGSG
GGGGGHGSYGSGSSSGGYR
IITHPNFNGNTLDNDIMLIRLSSP
ATLNSR
LGEHNIDVLEGNEQFINAAKIITH
PNFNGN, K methylated
IITHPNFNGNTLDNDIMoxLIRLSS
PATLNSR
Peptide
keratin
X
X
E
Peptide
keratin
X
X
E
Peptide
porcine trypsin, methylated
X
X
J
Peptide
keratin (human)
X
X
G
Peptide
bovine trypsin
X
X
J
Peptide
keratin
X
X
E
Peptide
bovine trypsin
X
X
J
Peptide
keratin (human)
X
X
G
Peptide
trypsin-like artefact, truncated
X
X
E
Peptide
porcine trypsin, methylated
X
X
J
Peptide
trypsin-like artefact, truncated
X
X
E