PSME4 and neoplasm: Moreover, we discovered that except for high expression of AMD1 and SAT1 in normal samples, other genes (PSMA4, PSME4, PSMC5, SMOX, PSMC6, PSMA7, PSMD10, SMS, PSMB7, AZIN2, PAOX, PSMD2) were all upregulated in tumor samples (Figure 3E).