Figure 3 presents scatterplots for GSTP1.C3 and GSTP1.C9, which show that the BPH group was characterized by elevated GSTP1.C3 values (the values of GSTP1.C9 are normal) while the PCa group was characterized by the elevated values of both GSTP1.C3 and GSTP1.C9. Here, GSTP1 is linked to benign prostatic hyperplasia.