Evaluation of the expression of various ROS-scavenger and disulfide isomerase genes using real-time PCR on tissue extracts of caput and cauda epididymidis from WT and DKO animals aged 4 months.

For each gene, the change in its expression in DKO versus WT male mice is indicated by + or − symbols, followed by the fold between the WT and DKO gene expressions ( = : not significantly different; +: increased; −: decreased; n = 5; *: p≤0.05; **: p≤0.01).