<enzyme> An enzyme which converts biocytin into biotin (one of the B vitamins) and lysine (an amino acid). ... (09 Oct 1997) ... 
Type: Term Pronunciation: bī-ō-sī′tin-āz Definitions: 1. An enzyme in blood that catalyzes the hydrolysis of biocytin to biotin and lysine (or, lysyl residue if the lysine is part of a protein sequence).