Group term for enzymes that form acyl-CoA compounds from the corresponding fatty acid s and CoA; the bond is through the sulfur atom of the CoA.
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thio·ki·nase (thi″o-kiґnās) a term used in the trivial names of some enzymes of the ligase class that catalyze the formation of a thioester by joining a carboxylic acid and coenzyme A, coupled to cleavage of a high-energy phosphate bond.Medical dictionary. 2011.