18-hydroxy-11-deoxycorticosterone + 2 oxidized [adrenodoxin] + H2O => 21-hydroxyprogesterone + 2 reduced [adrenodoxin] + O2 + 2 H(+)
18-hydroxy-11-deoxycorticosterone + 2 oxidized [adrenodoxin] + h2o => 21-hydroxyprogesterone + 2 reduced [adrenodoxin] + o2 + 2 h(+)