TSPO deletion does not affect expression of genes involved in testicular steroidogenesis. A, TSPO expression was undetectable in TSPOcΔ/Δ testis. StAR (B), CYP11A1 (C), and HSDB1 (D) expression levels were similar between TSPOfl/fl and TSPOcΔ/Δ testes. E, TSPO2 expression was not detectable in TSPOfl/fl and TSPOcΔ/Δ testes. Femur bone marrow was used as a positive control. (mean ± SEM; ND*, not detected; n = 6/group)