Recombinant Anti-CD32B x Anti-CD79B Bispecific Antibody (Tandem Fab) is designed to be expressed as three chains derived from the variable domains of anti-CD32B and anti-CD79B parental antibodies. It contains a His-tag for affinity purification. And the two Fd regions are connected by a flexible linker. This BsAb can regulate B-cell modulation. It is designed for the research of Immune diseases therapy.