Reaction catalyzed by arginyltransferase (2.3.2.8)

		+		bovine alpha-lactalbumin	=			+		L-arginyl-[bovine alpha-lactalbumin]
	L-arginyl-tRNAArg	+		bovine alpha-lactalbumin	=		tRNAArg	+		L-arginyl-[bovine alpha-lactalbumin]