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Transposable Elements Cheat Sheet (DRAFT) by

Cheatsheet: Transposable Elements

This is a draft cheat sheet. It is a work in progress and is not finished yet.


Transp­osable elements (TEs), also known as jumping genes, are DNA sequences that have the ability to move or transpose within a genome. They can change their position within the genome and are found in the genomes of various organisms, including bacteria, plants, and animals.


Retrot­ran­spo­sons: These elements transpose through an RNA interm­ediate.
a. Long terminal repeat (LTR) retrot­ran­spo­sons: Contain direct repeats and encode reverse transc­riptase and integrase enzymes.
b. Non-LTR retrot­ran­spo­sons: Lack LTRs and use a protein called reverse transc­riptase to transpose.

DNA transp­osons: These elements transpose directly via a DNA interm­ediate.
a. Class I transp­osons: Encode a transp­osase enzyme, which mediates the transp­osi­tion.
b. Class II transp­osons: Encode a transp­osase enzyme, similar to Class I transp­osons.