Non-fucosylated Anti-Human CD20 Therapeutic Antibody, an ADCC-Enhanced Biobetter [Lot: CB20-PZ08] (CAT#: BioBet-008ZP) Datasheet

Mouse Antibody
ADCC-enhanced Tositumomab is a non-fucosylated anti-CD20 therapeutic biobetter antibody. Creative Biolabs' Afuco™ technology platform allows for the control of glycosylation level, thereby achieving ADCC-Enhanced Anti-CD20 Tositumomab, a biobetter by reducing fucosylation of the Fc region of Tositumomab, leading to an increased binding affinity for the FcyR receptor on immune effector cells.
More specifically, the afucosylated therapeutic biobetter antibody was generated by recombinant DNA technology. It has been produced in CHO cells that are deficient for fucosylation and purified by affinity chromatography with protein G. The absence of the fucose residue from the N-glycans of IgG-Fc results in dramatic enhancement of antibody-dependent cellular cytotoxicity (ADCC).
Chronic lymphocytic leukemia; follicular lymphoma; some types of non-Hodgkin lymphoma (NHL);some non-cancer related illnesses
Therapeutic antibody; biobetter
Tositumomab was first received FDA approval in 2014. The patent will expire in 2028-11-25.

Cooperation Seeking

Creative Biolabs is interested in collaborating with potential partners (include but not limit to major pharma or biotech firms) to further co-develop ADCC-enhanced Tositumomab. For commercial partners interested in our ADCC-enhanced therapeutic antibodies, Creative Biolabs welcomes collaboration. Here are two ways for your choice, and please contact us for more details.
1) Collaborate with us and co-develop the programs from discovery phase to IND enabling. Costs will be shared.
2) Become a licensed candidate of our programs.
Looking forward to cooperating with you in the near future.
Official Name
Full Name
membrane spanning 4-domains A1
This gene encodes a member of the membrane-spanning 4A gene family. Members of this nascent protein family are characterized by common structural features and similar intron/exon splice boundaries and display unique expression patterns among hematopoietic cells and nonlymphoid tissues. This gene encodes a B-lymphocyte surface molecule which plays a role in the development and differentiation of B-cells into plasma cells. This family member is localized to 11q12, among a cluster of family members. Alternative splicing of this gene results in two transcript variants which encode the same protein.
Alternative Names
B1; S7; Bp35; CD20; CVID5; MS4A2; LEU-16
Gene ID
UniProt ID
Cellular Localization
Plasma membrane
Involvement in Disease
Diseases associated with MS4A1 include Immunodeficiency, Common Variable, 5 and Common Variable Immunodeficiency.
Related Pathways
Its related pathways are Hematopoietic cell lineage and Hematopoietic Stem Cells and Lineage-specific Markers.
b lymphocyte-specific membrane protein, which is involved in the regulation of cellular calcium influx necessary for the development, differentiation and activation of b lymphocytes (PubMed:3925015, PubMed:7684739, PubMed:12920111). After activation of b-cell receptor/BCR, it acts as a component of stored and operated calcium (SOC) channels to promote calcium influx (PubMed:7684739, PubMed:12920111, PubMed:18474602).
Field of research
Cancer antibody; Developmental Biology antibody; Immune System antibody; B cell Marker antibody; Immature B Cell Marker antibody; Inflammatory Cell Marker antibody; Tumor-infiltrating Lymphocyte Study antibody
Post-translational modifications
Phosphorylated. Might be functionally regulated by protein kinase(s).
Trade name
Approved, Investigational
Biologic Classification
Protein Based Therapies
Monoclonal antibody (mAb)
Accession Number
DB00081 (BTD00085, BIOD00085, DB09557)
CAS number
Antibody Isotype
Mouse Antibody
Antibody Clone
Tositumomab is a murine IgG2aλ monoclonal antibody against the CD20 antigen, produced in mammalian cells. Tositumomab is used in combination with the radioisotope iodine 131, a drug combination known as Bexxar. Tositumomab was developed by Corixa and approved in 2003 for a personalized protocol to treat relapsed and refractory non-Hodgkin's lymphoma.
Chronic Lymphocytic Leukaemia (CLL)
Chronic Lymphocytic Leukemia (CLL) - Refractory
Not Available

Tositumomab specifically binds the CD20 antigen found on mature B lymphocytes. CD20 molecules are expressed on normal B lymphocytes (from B to mature B lymphocytes) and B cell CLL. Studies have shown that possible mechanisms of cell lysis include complement-dependent cytotoxicity and antibody-dependent cell-mediated cytotoxicity.

For treatment of non-Hodgkin's lymphoma (CD20 positive, follicular)
Blood cancers
Chronic Lymphocytic Leukaemia (CLL)
Chronic Lymphocytic Leukemia (CLL) - Refractory

All products and services are for Research Use Only. Do Not use in humans.


Creative Biolabs has established a team of customer support scientists ready to discuss ADCC/CDC optimization strategies, antibody production, bioinformatics analysis and other molecular biology/biotechnology issues.

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