(glū-tam'il-trans'fĕr-ās), An enzyme that catalyzes the transfer of a γ-glutamyl group from a γ-glutamyl peptide (usually glutathione) to another peptide, certain amino acids, or water; a deficiency of this enzyme will result in glutathionuria. Synonym(s): γ-glutamyl transpeptidaseAcronymsSeeYGT