The production of DHP in testis. (A) The effects of 11-KT on DHP production in eel testicular fragments. C, control; mean ± SEM; n = 3 per condition; ∗, P < 0.01). (B) The conversion of 17α-hydroxyprogesterone (17P4) to DHP in separated germ (G), Sertoli (S), and interstitial (I) cells. Results are presented as mean ± SEM; n = 6 per condition; ∗, P < 0.01).