Title : Expression of cytochrome P-450(17) alpha, 3 beta-hydroxysteroid dehydrogenase/delta 5----4-isomerase, and steroid 5 alpha-reductase in rat H540 Leydig tumor cells.

Pub. Date : 1990 Dec 21

PMID : 2095353






1 Functional Relationships(s)
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1 Thus, after 3 beta-HSD-catalyzed formation from pregnenolone, progesterone was efficiently converted to 5 alpha-pregnan-3,20-dione (5 alpha-dihydroprogesterone) and subsequent metabolism to the corresponding 17 alpha-hydroxylated derivative and 5 alpha-androstan-3,17-dione in a reaction catalyzed by P-450(17) alpha. Progesterone hydroxy-delta-5-steroid dehydrogenase, 3 beta- and steroid delta-isomerase 1 Rattus norvegicus