SIALIC ACID SYNTHASE (N-ACETYLNEURAMINATE SYNTHASE) (EC 2.5.1.56) (N- ACETYLNEURAMINIC ACID SYNTHASE) (N-ACETYLNEURAMINATE-9-PHOSPHATE SYNTHASE) (EC 2.5.1.57) (N-ACETYLNEURAMINIC ACID PHOSPHATE SYNTHASE). [Source:SWISSPROT;Acc:Q9NR45]