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reporter gene

British  

noun

  1. a gene with an easily recognizable phenotype, used in analysing the regulation of gene structures

"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

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For example, the interacting proteins have to allow the two halves of the transcription factor to reunite, and the proteins must be able to reach the nucleus to activate the reporter gene.

From Nature • Apr. 11, 2012