“…The following biochemical assays were carried out on the penile tissue homogenate: protein determination (Bradford, ); nitric oxide (NO) level (Miranda, Espay, & Wink, ); arginase activity (Zhang, Hein, Wang, Chang, & Kuo, ); phosphodiesterase‐5 (PDE‐5) activity (Ademosun, Adebayo, & Oboh, ; Oboh, Adebayo, Ademosun, & Boligon, ); adenosine deaminase activity (Guisti & Galanti, ); acetylcholinesterase (AChE) activity (Ellman, Courtney, Andres, & Feather‐Stone, ; Rocha, Emanuelli, & Pereira, ); total thiol and nonprotein thiol level (Ellman, ); thiobarbituric acid reactive substances (TBARS; Shodehinde et al, ); catalase activity (Sinha, ) and superoxide dismutase activity (Alia, Horcajo, Bravo, & Goya, ).…”