blood enzyme amount blood gamma-glutamyltransferase amount CMO:0002239 EFO:0801692 blood GGTP amount 2014-05-12T11:33:10Z blood gamma-glutamyl transpeptidase amount EFO:0004532 blood gamma-GT amount caripark Trait.ontology VT:0010607 blood GGT amount The proportion, quantity, or volume in whole blood, serum, or plasma of this enzyme, which catalyzes the transfer of the gamma-glutamyl moiety of glutathione to an acceptor such as amino acid, peptide, or water. CMO:0002240 EFO:0801616 CMO:0002241