Recombinant Anti-CD44 x Anti-CR3 Bispecific Antibody (Diabody) is designed to be expressed as two polypeptide chains respectively. The two chains are cross-over pairing to form a dimer. It contains a His-tag for affinity purification. This BsAb can recruit macrophages to tumor cells. It is designed for the research of Glioblastoma; Squamous cancer therapy.