gamma-glutamyltransferase(redirected from G-glutamyltransferase)
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 transpeptidase
an enzyme that appears in the serum of patients with several types of liver or gallbladder disorders, including drug hepatotoxicity, biliary tract obstruction, alcohol-induced liver disease, and liver carcinoma. Normal adult (after 45 years of age) GGT blood levels are 8 to 38 U/L.