label: CMP-N-acetyl-beta-neuraminate + 2 Fe(II)-[cytochrome b5] + O2 + 2 H(+) <=> CMP-N-glycoloyl-beta-neuraminate + 2 Fe(III)-[cytochrome b5] + H2O
label_lc: cmp-n-acetyl-beta-neuraminate + 2 fe(ii)-[cytochrome b5] + o2 + 2 h(+) <=> cmp-n-glycoloyl-beta-neuraminate + 2 fe(iii)-[cytochrome b5] + h2o