passages.id: split_8_test_3286_passage
passages.type: progene_text
passages.text: Ovarian follicles of sexually mature fish were separated into primary , previtellogenic , vitellogenic , and mature stages and the expression of StAR , P450 side chain cleavage ( P450scc ) , 3beta-hydroxysteroid dehydrogenase ( 3beta-HSD ) , P450 hydroxylase / lyase ( P450c17 ) , 17beta-hydroxysteroid dehydrogenase type 1 ( 17beta-HSD1 ) , 17beta-hydroxysteroid dehydrogenase type 3 ( 17beta-HSD3 ) , and P450 aromatase ( P450aromA ) was determined by Real time RT - PCR .