Recombinant Anti-gp40 x Anti-TFRC Bispecific Antibody (Tandem Fab) is designed to be expressed as three chains derived from the variable domains of anti-gp40 and anti-TFRC parental antibodies. It contains a His-tag for affinity purification. And the two Fd regions are connected by a flexible linker. This BsAb can bind two tumor antigens simultaneously. It is designed for the research of Colon cancer; Ovarian cancer therapy.