Reaction catalyzed by protein N-terminal glutamine amidohydrolase (3.5.1.122)

	N-terminal L-glutaminyl-[protein]	+		H2O	=		N-terminal L-glutamyl-[protein]	+		NH3
	N-terminal L-glutaminyl-[protein]	+		H2O	=		N-terminal L-glutamyl-[protein]	+		NH3