Recombinant Anti-CD44 x Anti-CR3 Bispecific Antibody (Tandem Fab) is designed to be expressed as three chains derived from the variable domains of anti-CD44 and anti-CR3 parental antibodies. It contains a His-tag for affinity purification. And the two Fd regions are connected by a flexible linker. This BsAb can recruit macrophages to tumor cells. It is designed for the research of Glioblastoma; Squamous cancer therapy.