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Definition of Tetranucleotide

Tetranucleotide: A sequence of 4 base pairs. (Bases are the building blocks of DNA.) Expansion of a tetranucleotide repeat (CCTG) in the ZNF9 gene causes type 2 myotonic dystrophy.

Source: MedTerms™ Medical Dictionary
http://www.medicinenet.com/script/main/art.asp?articlekey=39351
Last Editorial Review: 6/14/2012

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