Reaction catalyzed by N-terminal L-serine Nalpha-acetyltransferase NatD (2.3.1.257)

		+		histone H2A	=		CoA	+		Nalpha-acetyl-histone H2A
	acetyl-CoA	+		histone H2A	=		CoA	+		Nalpha-acetyl-histone H2A