OR51E2 and prostate adenocarcinoma: Among them, we also observed that the surface proteins TSPAN1, OR51E2, FAM174B, PTPRN2, CHRNA2, CHRM1 (Figure 4C), and the non-surface proteins RDH11, CREB3L4, and TRPM4 (Figure 4F) showed a fold change ≥ 1.5 between PRAD and non-transformed tissue.