Etanercept antibody | AbD25939

100% Secure

Human anti Etanercept

Anti-Etanercept Antibody is a recombinant, non-inhibitory monovalent Fab antibody; it is ideal for bioanalytical assays to measure levels of etanercept and biosimilars. It is recommended as capture antibody in a PK bridging ELISA with HCA277P or HCA279P.

Product Type
Monoclonal Antibody
HuCAL Fab monovalent
Product Code Applications Pack Size List Price Quantity
0.1 mg loader

Human anti etanercept, clone AbD25939 is an antibody that specifically recognizes etanercept as well as the extracellular ligand-binding portion of the 75 kDa (p75) human tumor necrosis factor receptor 2 (TNFR2). Clone AbD25939 does not inhibit the binding of etanercept to its target tumor necrosis factor alpha (TNFα). The antibody binds to an epitope outside the TNFα binding site and can be used to measure the levels of etanercept and biosimilar products (e.g. Etacept, Intacept) in bioanalytical assays.

Our anti-etanercept antibodies can be used to develop pharmacokinetic (PK) bridging assays to measure either free drug or total drug. This antibody, in monovalent Fab format, is recommended as the capture antibody. For an assay to detect free drug, use with the inhibitory antibody, clone AbD25940_hIgG4Pro (HCA277P) for detection; for an assay to detect total drug use with p75-Fc-fusion specific clone AbD26183_hIgG1 (HCA279P) for detection.

Etanercept (Enbrel®) is a dimeric fusion protein consisting of the extracellular ligand-binding portion of the human 75 kDa (p75) TNFR2 linked to the Fc portion of human IgG1. The Fc component of etanercept contains the CH2 domain, the CH3 domain and hinge region, but not the CH1 domain of IgG1. It is used to treat autoimmune diseases by interfering with TNF, acting as a TNF inhibitor. It binds to both TNFα and TNFβ (Lymphotoxin A).

View a summary of all anti-etanercept antibodies.

Product Details

Product Form
A monovalent human recombinant Fab (lambda light chain) selected from the HuCAL® phage display library, expressed in E. coli. The antibody is tagged with a DYKDDDDK tag and a HIS-tag (HHHHHH) at the C-terminus of the antibody heavy chain. This antibody is supplied as a liquid.
Metal chelate affinity chromatography
Buffer Solution
Phosphate buffered saline
Preservative Stabilisers
0.01% Thiomersal
The monovalent intrinsic affinity of AbD25939 was measured as KD = 3.2 nM by real time, label free molecular interaction analysis on immobilized etanercept.
Approx. Protein Concentrations
Antibody concentration 0.5 mg/ml

Storage Information

This product is shipped at ambient temperature. It is recommended to aliquot and store at -20°C on receipt. When thawed, aliquot the sample as needed. Keep aliquots at 2-8°C for short term use (up to 4 weeks) and store the remaining aliquots at -20°C.

Avoid repeated freezing and thawing as this may denature the antibody. Storage in frost-free freezers is not recommended.
12 months from date of despatch

More Information

This product and/or its use is covered by claims of U.S. patents, and/or pending U.S. and non-U.S. patent applications owned by or under license to Bio-Rad Laboratories, Inc. See for details.
Enbrel® is a registered trademark of Immunex Corporation.
His-tag is a registered trademark of EMD Biosciences.
Licensed Use
For in vitro research purposes and for commercial applications for the provision of in vitro testing services to support preclinical and clinical drug development. Any re-sale in any form or any other commercial application needs a written agreement with Bio-Rad.
For research purposes only

Applications of Etanercept antibody

This product has been reported to work in the following applications. This information is derived from testing within our laboratories, peer-reviewed publications or personal communications from the originators. Please refer to references indicated for further information. For general protocol recommendations, please visit the antibody protocols page.
Application Name Verified Min Dilution Max Dilution
Where this product has not been tested for use in a particular technique this does not necessarily exclude its use in such procedures. Suggested working dilutions are given as a guide only. It is recommended that the user titrates the product for use in their own system using appropriate negative/positive controls.
Technical Advice
Recommended protocols and further information about HuCAL recombinant antibody technology can be found in the HuCAL Antibodies Technical Manual
This product may be used in a direct or indirect ELISA or as capture antibody for etanercept.
Protocol: PK bridging ELISA to measure free drug
Protocol: PK bridging ELISA to measure total drug

Useful Reagents Available

Description Product Code Applications Pack Size List Price Quantity
Hispec Assay Diluent BUF049A E IY 50 ml
Human anti Etanercept HCA277 E 0.1 mg loader
Human anti Etanercept:HRP HCA277P E 0.1 mg loader
Human anti Etanercept HCA279 E 0.1 mg loader
Human anti Etanercept:HRP HCA279P E 0.1 mg loader

Fluorescent Spectraviewer

Watch the Tool Tutorial Video ▸

How to Use the Spectraviewer

Watch the Tool Tutorial Video ▸
  • Start by selecting the application you are interested in, with the option to select an instrument from the drop down menu or create a customized instrument
  • Select the fluorophores or fluorescent proteins you want to include in your panel to check compatibility
  • Select the lasers and filters you wish to include
  • Select combined or multi-laser view to visualize the spectra