Reaction catalyzed by gamma-glutamyltransferase (2.3.2.2)
+
=
+
5-L-glutamyl-3-carboxy-4-nitroanilide
+
5-L-glutamyl-3-carboxy-4-nitroanilide
=
5-L-glutamyl-5-L-glutamyl-3-carboxy-4-nitroanilide
+
3-carboxy-4-nitroaniline