Recombinant Anti-Csl x Anti-CD3 Bispecific Antibody (Tandem Fab) is designed to be expressed as three chains derived from the variable domains of anti-Csl and anti-CD3 parental antibodies. It contains a His-tag for affinity purification. And the two Fd regions are connected by a flexible linker. This BsAb can retarget T cells to tumor cells. It is designed for the research of Breast cancer; Glioma cancaer; Glioblastoma; Multiple myeloma (MM); Leukemia therapy.