[Figure 5]: Transmission electron microscopy in tunica albuginea of corpus cavernosum (n = 2 per group). (a) In longitudinal section, anti-LOX + VD group showed loosely arranged collagen fibers (scale bars = 1 μm). (b) In cross section, remodeled appearances of collagen bundlea were more obvious in anti-LOX, VD, and anti-LOX + VD groups, they also showed irregular arranged collagen bundles and less ground substance, compared with the control group (scale bars = 2 μm). Anti-LOX: intragastric administration of β-aminopropionitrile (BAPN) with a dose of 100 mg kg−1 day−1. VD: vacuum device aspiration with negative pressure of -300 mmHg. LOX: lysyl oxidase.