a: Retrotransposon ~
b: retroviruses that are trapped in a cell
What: "Retrotransposons and retroviruses may have a common evolutionary origin. Retrotransposons encode an enzyme similar to RT, but not functional capsid and envelope proteins. So retrotransposons are like retroviruses that are trapped in a cell. Humans contain many retrotransposons as mobile elements in their genome."
Writer: Not Stated
Date: May 15 2013 10:16 PM
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