Reaction catalyzed by exo-alpha-sialidase (3.2.1.18)

		+		H2O	=			+
	N[(5-acetamido-3,5-dideoxy-D-glycero-alpha-D-galacto-non-2-ulopyranosyl)onate]-3-methylpyridinium	+		H2O	=		sialic acid	+		3-methylpyridine