N-acetylneuraminate epimerase (EC 5.1.3.24, sialic acid epimerase, N-acetylneuraminate mutarotase, sialic acid mutarotase, YjhT, NanM) is an enzyme with systematic name N-acetyl-alpha-neuraminate 2-epimerase.
[1] This enzyme catalyses the following chemical reaction Sialoglycoconjugates present in vertebrates are linked exclusively by alpha-linkages.