CeO2 nanoparticles are employed as immobilizing carriers of DNA probes, and an effective DNA electrochemical sensor was designed based on GoldNPs generated at the surface of carbon nanotubes (MWCNTs), CeO2, and chitosan (Chits) membrane to detect BCR/ABL fusion genes in CML [93]. The gene discussed is BCR; the disease is chronic myelogenous leukemia, BCR-ABL1 positive.