Haren, E.J.M. van

leydig enzyme leydig cells protein cholesterol production pregnenolone rat leydig cells activity cscc enzyme activity testosterone cscc enzyme effect steroidogenic steroidogenesi igf-i sertoli cells sertoli factor 450scc culture regulation leydig cell steroidogenesis action testosterone production hormone presence growth inhibitor amount induction level fraction cleavage pregnenolone production study medium testi receptor conversion mitochondrial membrane steroidogenic cascade synthesis androgen 22 r-hydroxycholesterol p 450scc enzyme tumour leydig cells side-chain preparation steroid cytochrome endocrinology biochem lh induction testicular p 450scc sterol tissue r-hydroxycholesterol cscc enzyme induction antibody metabolism rommert cascade transport tumour mouse leydig cells stimulation pregnenolone metabolism expression chapter absence carrier subcellular cholesterol side-chain cleavage 7 days mouse seminiferous tubules binding