Recombinant Anti-CD3 x Anti-CD38 Bispecific Antibody (IgG(L)-scFv) is formed by an IgG and two scFv moieties. The scFv fragments from an anti-CD3 antibody are fused to the C terminus of an anti-CD38 IgG light (L) chains, or vice versa. It is a type of appended IgGs, which is bispecific and tetravalent (2+2 antigen-binding valency). This BsAb can block two receptors simultaneously. It is designed for the research of Multiple myeloma (MM) therapy.