Reaction catalyzed by N-acetylneuraminate lyase (4.1.3.3)

		+			=
	6-O-alpha-D-mannopyranosyl-D-mannopyranose	+		pyruvate	=		3-deoxy-9-O-alpha-D-mannopyranosyl-D-glycero-beta-D-galacto-non-2-ulopyranosonic acid