label: an N-acylsphinganine + 2 Fe(II)-[cytochrome b5] + O2 + 2 H(+) <=> an N-acylsphing-14Z-enine + 2 Fe(III)-[cytochrome b5] + 2 H2O
label_lc: an n-acylsphinganine + 2 fe(ii)-[cytochrome b5] + o2 + 2 h(+) <=> an n-acylsphing-14z-enine + 2 fe(iii)-[cytochrome b5] + 2 h2o