PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 28637041-2 2017 In human placenta, 3beta-hydroxysteroid dehydrogenase 1 (HSD3B1) catalyzes pregnenolone to form progesterone, and aromatase (CYP19A1) catalyzes testosterone into estradiol. Pregnenolone 75-87 cytochrome P450 family 19 subfamily A member 1 Homo sapiens 125-132