Reaction catalyzed by beta-galactoside alpha-(2,6)-sialyltransferase (2.4.3.1)

		+		asialo-alpha1-acid glycoprotein	=			+		alpha1-acid glycoprotein
	CMP-N-acetylneuraminate	+		asialo-alpha1-acid glycoprotein	=		CMP	+		alpha1-acid glycoprotein