Lemus, A E 5alpha-reduction of norethisterone enhances its binding affinity for androgen receptors but diminishes its androgenic potency. [electronic resource] - The Journal of steroid biochemistry and molecular biology Jan 1997 - 121-9 p. digital Publication Type: Comparative Study; Journal Article ISSN: 0960-0760 Standard No.: 10.1016/s0960-0760(96)00172-0 doi Subjects--Topical Terms: Androgens--physiologyAnimalsBinding, CompetitiveDose-Response Relationship, DrugDrug SynergismEthisterone--metabolismGlucuronidase--drug effectsKidney--drug effectsMaleMiceMice, Inbred BALB CNandrolone--analogs & derivativesNorethindrone--analogs & derivativesOrchiectomyOrgan Size--drug effectsOxidation-ReductionProgesterone Congeners--metabolismProstate--drug effectsRatsRats, WistarReceptors, Androgen--metabolismSeminal Vesicles--drug effectsStructure-Activity RelationshipTestosterone--analogs & derivativesTritium