Bakker, G.H.

protein production tumour leydig cells leydig phosphorylation phosphoprotein pregnenolone cholesterol tumour synthesis protein synthesis lutropin effect van der molen activity pregnenolone production lutropin-dependent mitochondria cyclic kinase regulation presence leydig cells fraction result biochem incubation enzyme cycloheximide lutropin-dependent phosphoproteins cooke cleavage side-chain bakker mitochondrial cytosol section molen hormone calcium amount stimulation microfilament addition membrane culture 32° c action cyclic amp lh-dependent control inhibitor subcellular study steroidogenesi phosphorylated factor 20000 da protein initiation 60 min protein phosphorylation inhibition lh /mix biophy steroidogenic testis leydig cells subunit 37° c testi increase rommert phosphorylated proteins 57000 da lh-dependent phosphoproteins farese incorporation table concentration janszen cytochrome