PSMA4 and neoplasm: Excess dietary iron in tumor tissues was also associated with significant changes (generally, increases; p ≤ 0.05) in proteins involved in modulating cell protein integrity (HSPA5, HSPA9, ITGB1, PSMA4, DPP7, and PEPD), cell mobility and growth (CAPZB), and immunologic factors (FCGBP).