Other monoclonal

Others include gemtuzumab ozogamicin,which is a monoclonal antibody conjugated with a plant toxin that binds to CD33 (a cell-surface receptor that is present on the leukemia cells of 80 percent of patients with acute myelocytic leukemia); alemtuzumab, which is effective in treatment of B-cell chronic lymphocytic leukemia that no longer responds to other agents; and I131-tositumomab, which is used in relapsed non-Hodgkin lymphoma.