Figure 6.
Percentages of sperm with high intracellular O2− levels in relation to viable sperm (E+/viable sperm) (a) and sperm exhibiting high mitochondrial membrane potential (MMP) (b) during in vitro capacitation and acrosomal exocytosis induced by progesterone (300 min). The black arrows indicate the addition of progesterone at a final concentration of 10 μg/mL (240 min). Data are represented as means ± SD. Different letters indicate significant differences (p < 0.05) between sperm samples containing high and low relative levels of PARK7.