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Segments of TIC chromatograms of skin sterols targeted to show minor sterols. The small desmosterol peak was only found in this one control sample and no peaks were seen for 7DHD or 5,24-cholestadien-3β-ol. In the control animal, the peak marked by an asterisk with the retention time of 7DHC was an unidentified dehydro-methylcholesterol, presumably of plant origin.
