Recombinant Anti-CD2 x Anti-TCR (Vβ8) Bispecific Antibody (Diabody-Fc) is a fusion protein of two diabodies connected together by an Fc region. In a diabody, the two scFvs with short linkers are from anti-CD2 and anti-TCR (Vβ8) antibodies. The VH and VL domains form an inter-chain pairing. The diabody with different specificities is fused to the Fc fragment, which results in 2+2 antigen-binding valency and exerts Fc-mediated functions or just extends the half-life. This BsAb can activate T cells. It is designed for the research of Tumors therapy.