CYP27A1 and posterior cortical atrophy: The Human Protein Atlas was further utilized to explore the protein levels of driver genes, which suggested that GSTM2, HAAO, C2orf88, CYP27A1, HFE, C8orf88, GSTP1, EFS, HIF3A, and WFDC2 showed varying degrees of lower expression in PCa (Figure 8B).