... retention time and UV spectra (inset 3 in D) corresponding to the 7-DHP standard (inset 2 in D and inset in C). The product was at the limits of detectability in the c ontrol sample with the ... and in mitochondria incubated in theabsence of NADPH and isocitrate ( B an d E) . T he second peak (unkno wn) h ad a retention time 15.6 min and UV sp ectra (inset 4 in D) similar tothose of ... Hospital Oakland Research Institute,Oakland, CA, USA for performing G C/MS an alyses, and Pr ofessorWalter Miller, U niversity o f C alifornia, San Francisco for the gift of N-62 StAR protein and StAR...