Reaction catalyzed by polypeptide N-acetylgalactosaminyltransferase (2.4.1.41)

		+			=			+		N-acetyl-D-galactosaminylated Ac-CIRIQRGPGRAFVTIGKIGNMR
	UDP-N-acetyl-D-galactosamine	+		Ac-CIRIQRGPGRAFVTIGKIGNMR	=		UDP	+		N-acetyl-D-galactosaminylated Ac-CIRIQRGPGRAFVTIGKIGNMR