19-hydroxytestosterone + reduced [NADPH--hemoprotein reductase] + O2 <=> 19-oxotestosterone + oxidized [NADPH--hemoprotein reductase] + 2 H2O + H(+)
19-hydroxytestosterone + reduced [nadph--hemoprotein reductase] + o2 <=> 19-oxotestosterone + oxidized [nadph--hemoprotein reductase] + 2 h2o + h(+)