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exonuclease

noun
  1. an enzyme that is capable of detaching the terminal nucleotide from a nucleic acid chainCompare endonuclease
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Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

exonuclease in Medicine

exonuclease

(ĕk′sō-nōōklē-ās′, -āz′)
n.
  1. Any of a group of enzymes that catalyze the hydrolysis of single nucleotides from the end of a DNA or RNA chain.
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.