InVivoSIM anti-human CD20 (Rituximab Biosimilar)

Catalog #SIM0008
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$224.00 - $7,752.00

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  • 100 mg - $7,752.00
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Product Details

This non-therapeutic biosimilar antibody uses the same variable regions from the therapeutic antibody Rituximab making it ideal for research use. This Rituximab biosimilar reacts with human CD20. CD20 is a B cell-specific 33-37 kDa transmembrane protein which is also known as B-lymphocyte antigen, B1, and Bp35. CD20 plays roles in intracellular calcium regulation and B cell activation and is critical for an optimal B cell immune response against T-independent antigens. CD20 is first expressed after the induction of CD19 together with IgM during the pre-B to immature B cell transition in the bone marrow. It’s expression then increases during maturation with almost all mature B cells expressing some level of CD20. However, CD20 is not expressed by plasma blasts or plasma cells. CD20 is expressed by most B cell neoplasms, and is useful in diagnosing B cell lymphomas and leukemia’s. Many anti-CD20 monoclonal antibodies are currently being used to successfully treat leukemia’s, lymphomas, and various autoimmune diseases. Rituximab has depleting activity and mediates ADCC and CDC of CD20+ cells. This results in the elimination of B cells from the body.


Isotype Human IgG1
Recommended Isotype Control(s) RecombiMAb human IgG1 isotype control, anti-hen egg lysozyme
Recommended Dilution Buffer InVivoPure pH 7.0 Dilution Buffer
Conjugation This product is unconjugated. Conjugation is available via our Antibody Conjugation Services.
Immunogen Human lymphoblastoid cell line SB
Reported Applications Flow Cytometry
Western Blot
Formulation PBS, pH 7.0
Contains no stabilizers or preservatives
Endotoxin <1EU/mg (<0.001EU/μg)
Determined by LAL gel clotting assay
Aggregation <5%
Determined by SEC
Purity >95%
Determined by SDS-PAGE
Sterility 0.2 µm filtration
Production Purified from cell culture supernatant in an animal-free facility
Purification Protein A
RRID AB_2894729
Molecular Weight 150 kDa
Murine Pathogen Tests Ectromelia/Mousepox Virus: Negative
Hantavirus: Negative
K Virus: Negative
Lactate Dehydrogenase-Elevating Virus: Negative
Lymphocytic Choriomeningitis virus: Negative
Mouse Adenovirus: Negative
Mouse Cytomegalovirus: Negative
Mouse Hepatitis Virus: Negative
Mouse Minute Virus: Negative
Mouse Norovirus: Negative
Mouse Parvovirus: Negative
Mouse Rotavirus: Negative
Mycoplasma Pulmonis: Negative
Pneumonia Virus of Mice: Negative
Polyoma Virus: Negative
Reovirus Screen: Negative
Sendai Virus: Negative
Theiler’s Murine Encephalomyelitis: Negative
Storage The antibody solution should be stored at the stock concentration at 4°C. Do not freeze.
    • Immunology and Microbiology
    • ,
    A mechanistic marker-based screening tool to predict clinical immunogenicity of biologics.

    In Commun Med (Lond) on 8 December 2023 by Jarvi, N. L. & Balu-Iyer, S. V.


    The efficacy and safety of therapeutic proteins are undermined by immunogenicity driven by anti-drug antibodies. Immunogenicity risk assessment is critically necessary during drug development, but current methods lack predictive power and mechanistic insight into antigen uptake and processing leading to immune response. A key mechanistic step in T-cell-dependent immune responses is the migration of mature dendritic cells to T-cell areas of lymphoid compartments, and this phenomenon is most pronounced in the immune response toward subcutaneously delivered proteins. The migratory potential of monocyte-derived dendritic cells is proposed to be a mechanistic marker for immunogenicity screening. Following exposure to therapeutic protein in vitro, dendritic cells are analyzed for changes in activation markers (CD40 and IL-12) in combination with levels of the chemokine receptor CXCR4 to represent migratory potential. Then a transwell assay captures the intensity of dendritic cell migration in the presence of a gradient of therapeutic protein and chemokine ligands. Here, we show that an increased ability of the therapeutic protein to induce dendritic cell migration along a gradient of chemokine CCL21 and CXCL12 predicts higher immunogenic potential. Expression of the chemokine receptor CXCR4 on human monocyte-derived dendritic cells, in combination with activation markers CD40 and IL-12, strongly correlates with clinical anti-drug antibody incidence. Mechanistic understanding of processes driving immunogenicity led to the development of a predictive tool for immunogenicity risk assessment of therapeutic proteins. These predictive markers could be adapted for immunogenicity screening of other biological modalities. © 2023. The Author(s).