5beta-cholestan-3alpha, 7alpha, 12alpha-triol is translocated from the cytosol to the mitochondrial matrix 5beta-cholestan-3alpha,7alpha,12alpha-triol is translocated from the cytosol to the mitochondrial matrix. The transporter that mediates its passage across the inner mitochondrial membrane is unknown: the StAR protein that performs this function for cholesterol at the start of steroid hormone biosynthesis is excluded as StAR is not expressed in liver. Other members of the START family of transporters are candidates, however (Russell 2003). Authored: Jassal, B, 2007-01-19 10:34:59 Edited: D'Eustachio, P, 2007-02-17 19:40:28 Pubmed12543708 Reactome Database ID Release 43192010 Reactome, http://www.reactome.org ReactomeREACT_10097 Reviewed: D'Eustachio, P, 2007-04-30 14:43:26