desmosterol + reduced [NADPH--hemoprotein reductase] + O2 = (24Z),26-hydroxydesmosterol + oxidized [NADPH--hemoprotein reductase] + H2O + H(+)
desmosterol + reduced [nadph--hemoprotein reductase] + o2 = (24z),26-hydroxydesmosterol + oxidized [nadph--hemoprotein reductase] + h2o + h(+)