Immunohistochemical information from the HPA database showed that higher staining of GSTM4, PLP1, and PTGS2 was found in normal prostate tissue, while higher staining of SLC27A2, SLC45A3, APOE, and ABCC4 was observed in prostate cancer tissue (Figure s1B). Here, GSTM4 is linked to Familial prostate cancer.