Reaction catalyzed by protein-glutamine gamma-glutamyltransferase (2.3.2.13)

	10-kDa heat shock protein-bound gamma-glutamine	+			=		10-kDa heat shock protein N5-methylglutamine	+		NH3
	10-kDa heat shock protein-bound gamma-glutamine	+		methylamine	=		10-kDa heat shock protein N5-methylglutamine	+		NH3