Janszen, F.H.A.

leydig protein leydig cells lutropin synthesis testosterone testosterone production production testi stimulation hormone incubation van der molen effect steroidogenesi cooke luteinizing hormone presence addition protein synthesis preparation cyclic luteinizing rat testis lh-ip molen activity control result 30 min cyclic amp half life janszen suspension lutropin-induced protein synthesis density dufau lutropin-induced centrifugation tumour leydig cells actinomycin experiment solution tissue amount lutropin stimulation lutropin-induced protein endocrinology study method cholesterol leydig cell preparations receptor leydig cell suspensions increase ficoll trophic dibutyryl cyclic amp cycloheximide lh-ip synthesis regulation tumour section kinase table absence choriogonadotropin steroidogenic phenyl esterase activity steroidogenic activity fraction decrease biophy response medium number purification concentration eik-ne trophic hormone