Figure 4

Scatter plot of epididymal-expressed genes between the two groups. The yellow points represent genes that are not expressed in either group. The blue points indicate the genes that are expressed in either of the two groups. The red points denote genes that are expressed in both groups. The four upper-left diagonal lines represent the fold of up-regulated gene expression, which is 2, 3, 10 and 30 times, respectively; meanwhile, the four lower-right diagonal lines represent the fold of down-regulated gene expression, which is 1/2, 1/3, 1/10 and 1/30, respectively.