Biology 1001A Lecture Notes - Lecture 9: Reverse Transcriptase, Inverted Repeat, Retrotransposon
28 Mar 2016
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Document Summary
Independent study outcomes: differences among insertion sequences, transposons and retrotransposons. Relatively small and contain only genes for their transposition, notably the gene for transposase: an enzyme for catalyzing some recombination reactions for inserting or removing the te from dna. A short inverted repeat sequence the same dna just running in opposite directions. This inverted repeat sequence enables transposase enzyme to identify ends of te when it catalyzes transposition. Transposons: has an inverted repeat sequence at each end enclosing a central region with one or more genes. Inverted repeat sequences are often insertion sequences which provide transposase for movement of the element. Additional genes in central region typically code for antibiotic resistance. Non is genes included in transposons are carried along as the te moves form place to place: eukaryotic te"s. Eukaryotic transposons: similar to bacterial transposons in structure & how they transpose. Retrotransposons: transpose by a copy and paste mechanism (unlike any other te discussed here)
