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Definition of Transposon

Transposon: A short mobile DNA sequence that can replicate and of which copies can be inserted at random sites within chromosomes. A transposon has almost identical sequences at each end and inverted repeat sequences (that run in the opposite direction). It codes for the enzyme, transposase, that catalyses its insert in the chromosome.

Source: MedTerms™ Medical Dictionary
http://www.medicinenet.com/script/main/art.asp?articlekey=6295
Last Editorial Review: 6/14/2012

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