2.7.1.60	N-acylmannosamine kinase	N-acetylneuraminate and N-acetylmannosamine degradation I	
4.1.3.3	N-acetylneuraminate lyase	N-acetylneuraminate and N-acetylmannosamine degradation I	
5.1.3.9	N-acylglucosamine-6-phosphate 2-epimerase	N-acetylneuraminate and N-acetylmannosamine degradation I