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A radioimmunoconjugate consisting of murine monoclonal antibody (M195) and bismuth 213 (Bi213). Monoclonal antibody M195 binds to CD33, a surface antigen expressed by myelogenous leukemia cells. Bi213 is an isotope that emits short-ranged high-energy alpha particles. This radioimmunoconjugate selectively delivers alpha particle-mediated cytotoxicity to leukemic cells, thereby limiting the exposure of normal tissues to ionizing radiation. Check for \'https://www.cancer.gov/about-cancer/treatment/clinical-trials/intervention/C28502\' active clinical trials using this agent. (\'http://ncit.nci.nih.gov/ncitbrowser/ConceptReport.jsp?dictionary=NCI%20Thesaurus&code=C28502\' NCI Thesaurus)
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