Transposons and
Mechanisms of Transposition
Wuda Wang(MCB720)
Transposable Elements
• Transposons
-1. The Discovery of Transposable Element
-2. Two types of transposons
2.1 Insertion Sequence (IS)
2.2 Composite Transposon
-3. Two mechanisms of Transposition
3.1 Replicative Transposition
3.2 Non-replicative Transposition
• Retrotransposons
1. The Discovery of Transposable Element
2.1
Insertion
Sequence
(IS)
Formation
of target
repeats
2.2 Composite Transposon
3.1 Replicative Transposition
3.2 Non-replicative Transposition
Mechanism 1: share
some steps with
replicative transposition
Mechanism 2:
cleavage and ligation