cholesterol + reduced [NADPH--hemoprotein reductase] + O2 <=> 4beta-hydroxycholesterol + oxidized [NADPH--hemoprotein reductase] + H2O + H(+)
cholesterol + reduced [nadph--hemoprotein reductase] + o2 <=> 4beta-hydroxycholesterol + oxidized [nadph--hemoprotein reductase] + h2o + h(+)
cholesterol + reduced [NADPH--hemoprotein reductase] + O2 <=> 4beta-hydroxycholesterol + oxidized [NADPH--hemoprotein reductase] + H2O + H(+)
cholesterol + reduced [nadph--hemoprotein reductase] + o2 <=> 4beta-hydroxycholesterol + oxidized [nadph--hemoprotein reductase] + h2o + h(+)