2.5.1.57	N-acylneuraminate-9-phosphate synthase	CMP-N-acetylneuraminate biosynthesis I (eukaryotes)	-	-	
2.7.1.60	N-acylmannosamine kinase	CMP-N-acetylneuraminate biosynthesis I (eukaryotes)	-	-	
2.7.7.43	N-acylneuraminate cytidylyltransferase	CMP-N-acetylneuraminate biosynthesis I (eukaryotes)	-	-	
3.1.3.29	N-acylneuraminate-9-phosphatase	CMP-N-acetylneuraminate biosynthesis I (eukaryotes)	-	-	
3.2.1.183	UDP-N-acetylglucosamine 2-epimerase (hydrolysing)	CMP-N-acetylneuraminate biosynthesis I (eukaryotes)	-	-