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. 2014 Nov 14;15(11):21028–21044. doi: 10.3390/ijms151121028

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© 2014 by the authors; licensee MDPI, Basel, Switzerland.

This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution license (http://creativecommons.org/licenses/by/4.0/).

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Steroidogenic enzyme activities in the testes from control and stressed rats during the course of immobilization stress. (A) 17α-hydroxylase/17,20-lase (CYP17A1) to catalyze progesterone (P4) to androstenedione (D4); (B) 3β-hydroxysteroid dehydrogenase 1 (HSD3B1) to catalyze pregnenolone to P4; and (C) 17β-hydroxysteroid dehydrogenase 3 (HSD17B3) to catalyze D4 to testosterone (T). Mean ± SEM (n = 6). LogV = log velocity (µg/mg protein.min). *, *** indicate significant difference compared to control (CON) at each time point at p < 0.05 or p < 0.001, respectively.