Recombinant Anti-EGFR x Anti-IGF1R Bispecific Antibody (Tandem Fab) is designed to be expressed as three chains derived from the variable domains of anti-EGFR and anti-IGF1R 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 and inactivate two receptors simultaneously. It is designed for the research of Colorectal cancer; Cervical cancer; Breast cancer; Pancreatic cancer therapy.