Schematic computer artwork of the monoclonal antibody Blinatumomab, a bi-specific T-cell engagers (BiTEs). Blinatumomab (trade name) specifically targets the CD19 antigen present on B cells. Blinatumomab enables a patient's T cells to recognize malignant B cells. A molecule of blinatumomab combines two binding sites: a CD3 site for T cells and a CD19 site for the target B cells. CD3 is part of the T cell receptor. The drug works by linking these two cell types and activating the T cell to exert cytotoxic activity on the target cell.Blinatumomab is used as a second-line treatment against acute lymphoblastic leukemia. T