Reaction catalyzed by histone acetyltransferase (2.3.1.48)

		+		[histone H2B]-L-lysine	=		CoA	+		[histone H2B]-N6-acetyl-L-lysine
	acetyl-CoA	+		[histone H2B]-L-lysine	=		CoA	+		[histone H2B]-N6-acetyl-L-lysine