4alpha-(Hydroxymethyl)-4beta,14alpha-dimethyl-9beta,19-cyclo-5alpha-ergost-24(24(1))-en-3beta-ol + 2 Ferrocytochrome b5 + Oxygen + 2 H+ <=> 4alpha-Formyl-4beta,14alpha-dimethyl-9beta,19-cyclo-5alpha-ergost-24(24(1))-en-3beta-ol + 2 Ferricytochrome b5 + 2 H2O