Recombinant Anti-gp40 x Anti-TFRC Bispecific Antibody (scDiabody-CH3) is a fusion protein of two scDiabodies connected together by a CH3 region. In single-chain Diabodies, an additional connecting linker is introduced between chains of the anti-gp40/anti-TFRC diabody. The scDiabody with two specificities is fused to each of the CH3 chains to extend half-life. This BsAb can bind two tumor antigens simultaneously. It is designed for the research of Colon cancer; Ovarian cancer therapy.