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

	fibronectin-bound gamma-glutamine	+			=		fibronectin N5-alkylglutamine	+		NH3
	fibronectin-bound gamma-glutamine	+		alkylamine	=		fibronectin N5-alkylglutamine	+		NH3