R&D Systems offers a wide range of antibodies to cytokines, adhesion molecules, proteases, neurotrophic factors, stem cell factors, signal transduction molecules, and developmental proteins. Monoclonal and polyclonal antibodies are available with multiple labeled options or unlabeled. With over 20,000 antibody products validated in 25+ species and 15+ applications, our antibodies fit into all work flows.

Knockout validated antibodies   NEW Flow Cytometry Handbook
Alexa Fluor antibodies   New Cell Markers Tool
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The R&D Systems Approach to Quality

Our commitment to quality is unmatched. Learn more about how we generate our high-quality antibodies.

Antibodies built for Reproducibilty

Built for Reproducibility

Results are everything, trust our antibodies. Learn more about our legacy and commitment to antibody reproducibility.

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Bulk Antibodies

We have the ability to scale up antibody production to meet your needs. Economical pricing means you don't have to sacrifice quality to meet your budget.

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Custom Antibody Development

Utilize our expertise in cloning antigens and in-house antibody development processes to create the antibody of your choice.

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Recombinant Monoclonal Antibodies

Minimize one source of experimental variability with our selection of recombinant antibodies from rabbit, mouse, and rat host species.

Secondary antibodies
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Immunohistochemistry and Immunocytochemistry Antibodies

Highly specific antibodies for IHC and ICC. Click to learn more and see a listing.

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Flow Cytometry Antibodies

Conjugated antibodies for surface and intracellular staining. Available in 100 tests and or 25 test sizes.

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See Our Complete List of Matched Antibody Pairs for ELISA

Qualified capture and detection antibody pairs for assay development on various assay platforms.

Epitope tag antibodies

Epitope Tag Antibodies

Antibodies for the identification and purification of epitope-tagged molecules.

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Simple Western™ Certified Antibodies

The largest collection of Simple Western certified antibodies. All antibodies certified in-house by our experienced scientists for use on your Wes, Sally Sue, and Peggy Sue.

blocking/neutralization antibodies

Blocking/Neutralizing Antibodies

Our extensive collection of proteins and our bioassay expertise allow us to provide the best and most dependable selection of blocking/neutralizing antibodies on the market.

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Optimized protocols for Flow Cytometry, Immunohistochemistry, Western blot, and other applications.

biosimilar antibodies


Our Biosimilar Antibodies are recombinantly expressed using the same sequence as the Therapeutic antibody. They are a great option for research use.