Reaction catalyzed by gamma-glutamyltransferase (2.3.2.2)

		+			=			+
	hexane-1,6-diyldicarbamic acid linked GSH-GSH	+		glycylglycine	=		gamma-glutamyl-S-[(6-[[([(2R)-2-amino-3-[(carboxymethyl)amino]-3-oxopropyl]sulfanyl)carbonyl]amino]hexyl)carbamoyl]cysteinylglycine	+		L-Glu-Gly-Gly