Recombinant Human Anti-CD20 x Human Anti-CD22 Tandem Fab-PAP immunotoxin (Bispecific Immunotoxin)  (BSFAB-PAP022)

Recombinant Anti-CD20 x Anti-CD22 Tandem Fab-PAP immunotoxin (Bispecific Immunotoxin) is designed to be expressed as the pokeweed antiviral protein (PAP) fused to a tandem Fab recognizing CD20 and CD22. It contains three chains and a His-tag at the C/N terminus for affinity purification. The two Fd regions are connected by a flexible linker. This bispecific immunotoxin can deliver PAP to antigen-specific cells. Then PAP is a ribosome inhibitory single chain plant toxin and can kill the target cells. The bispecific immunotoxin is designed for the research of Lymphoma; Leukemia; Antoimmune disease; Immune dysfunction disease therapy.

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