A class of enzymes (EC class 5) catalyzing the conversion of a substance to an isomeric form; e.g., glucosephosphate i..
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isom·er·ase ī-'säm-ə-.rās, -.rāz n an enzyme that catalyzes the conversion of its substrate to an isomeric form
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n.
any one of a group of enzymes that catalyse the conversion of one isomer of a compound into another.
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isom·er·ase (i-somґər-ās) [EC 5] a class of enzymes that catalyze geometric or structural changes within a molecule to form a single product. The reactions do not involve a net change in the concentration of compounds other than the substrate and the product. The class includes epimerases, isomerases, mutases, and racemases.Medical dictionary. 2011.