CMP-N-acetylneuraminate monooxygenase activity
cmp-n-acetylneuraminate monooxygenase activity
Catalysis of the reaction: CMP-N-acetyl-beta-neuraminate + 2 Fe(II)-[cytochrome b5] + 2 H+ + O2 = CMP-N-glycoloyl-beta-neuraminate + 2 Fe(III)-[cytochrome b5] + H2O.