Reaction catalyzed by acetyl-CoA carboxytransferase (2.1.3.15)

		+			=			+
	[biotin carboxyl-carrier protein]-N6-carboxybiotinyl-L-lysine	+		acetyl-CoA	=		[biotin carboxyl-carrier protein]-N6-biotinyl-L-lysine	+		malonyl-CoA