The amount of a glutathione-specific gamma-glutamylcyclotransferase 2 (human) when measured in blood. The trait is Ontology of Biological Attributes identifier OBA_2052651 (amount of glutathione-specific gamma-glutamylcyclotransferase 2 (human) in blood). Also known as: blood glutathione-specific gamma-glutamylcyclotransferase 2 (human) amount.