Medical Dictionary

zinc finger

noun

Medical Definition of zinc finger

  1. :  any of a class of proteins that typically possess tandem repeats of fingerlike loops of amino acids with each loop containing a zinc-binding site at its base consisting of two molecules of cysteine and two molecules of histidine and that regulates transcription by binding to specific regions of a gene's DNA; also :  one of the fingerlike amino acid loops of such a protein


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