the microsomal fraction prepared from the ah22/pa alpha 1 cells showed 17 alpha-hydroxylase activity toward progesterone and pregnenolone to higher extents , and exhibited c17,20-lyase activity toward 17 alpha-hydroxypregnenolone to a lesser extent and almost no c17,20-lyase activity toward 17 alpha-hydroxyprogesterone .
C0373704
pregnenolone
C0376260
17 alpha-hydroxypregnenolone