These genes included RBP2 (vitamin digestion and absorption), NCK1 (ErbB signaling pathway, T cell receptor signaling pathway, and Axon guidance), IL20RB (Jak-STAT signaling pathway and cytokine–cytokine receptor interaction), and MRAS (tight junction, phospholipase D signaling pathway, proteoglycans in cancer, Rap1 signaling pathway, regulation of actin cytoskeleton, Ras and MAPK signaling pathways, and HTLV-I infection). The gene discussed is RBP2; the disease is cancer.