Immunohistochemical (IHC) analysis of samples from the Human Protein Atlas (HPA) database further confirmed these trends: KIF21A (Figure 5D) and PIGH (Figure 5E) exhibited low expression, while RPS6KA2 (Figure 5F) exhibited high expression in ccRCC tissues compared to normal tissues. The gene discussed is RPS6KA2; the disease is nonpapillary renal cell carcinoma.