the labelling of untreated microsomal fractions with trace amounts of [ ( 14 ) c ] cholesterol followed by subfractionation of the labelled microsomal fraction showed that the specific radioactivity of cholesteryl esters obtained in vitro by the various subfractions was similar with all subfractions but different from the specific radioactivity of the 7alpha-hydroxycholesterol obtained in vitro by the same subfraction .
C0008377
cholesterol
C0008387
cholesteryl esters