3 BETA-HYDROXYSTEROID DEHYDROGENASE/DELTA 5-->4-ISOMERASE TYPE I (3BETA-HSD I) (TROPHOBLAST ANTIGEN FDO161G) [INCLUDES: 3-BETA-HYDROXY- DELTA(5)-STEROID DEHYDROGENASE (EC 1.1.1.145) (3-BETA-HYDROXY-5-ENE STEROID DEHYDROGENASE) (PROGESTERONE REDUCTASE); STEROID DELTA- ISOMERASE (EC 5.3.3.1) (DELTA-5-3-KETOSTEROID ISOMERASE)]. [Source:SWISSPROT;Acc:P14060]