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allozyme

British  
/ ˈæləʊˌzaɪm /

noun

  1. any one of a number of different structural forms of the same enzyme coded for by a different allele

"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

Etymology

Origin of allozyme

C20: from allo- + ( en ) zyme