Omalizumab antibody | AbD20760_hIgG1

Human anti Omalizumab (Drug/Target Complex)

Product Type
Monoclonal Antibody

Product Code Applications Pack Size List Price Your Price Qty
Datasheet Datasheet Datasheet
SDS Safety Datasheet SDS
E 0.1 mg loader
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Human anti omalizumab, clone AbD20760_hIgG1 binds specifically to the omalizumab/IgE (drug/target) complex. The antibody does not recognize free omalizumab or free human IgE. It can be used in bioanalytical assays to detect bound omalizumab or biosimilar products exclusively.

Clone AbD20760_hIgG1 can be used to develop a pharmacokinetic (PK) antigen capture assay to measure omalizumab captured via immobilized human IgE or to measure the level of drug/IgE complex in preclinical or clinical samples. This product is in a full immunoglobulin format and is available directly labeled with HRP. The antibody is also available in unlabeled Fab format (HCA238).

Omalizumab (brand name Xolair®) is a recombinant DNA-derived humanized IgG1 kappa monoclonal antibody used in the treatment of patients with moderate or severe asthma who have demonstrated a positive allergy skin test and whose symptoms are not controlled by inhaled corticosteroids.

Allergic asthma is mediated by IgE released by B cells in response to allergen. Circulating IgE binds to the high-affinity IgE Fc receptor (FcεRI) expressed on basophils and mast cells, triggering the release of histamine, leukotrienes and other mediators associated with the pathophysiology of asthma. Omalizumab is directed against the Fc region of human immunoglobulin E (IgE). By binding to circulating IgE at the site of FcεRI binding, this therapeutic antibody prevents the interaction of IgE with its receptor thus limiting mediator release. Treatment with omalizumab has also been demonstrated to reduce the expression of FcεRI on mast cells and basophils, providing additional clinical benefit.

View a summary of all anti-omalizumab antibodies

Product Form
Human IgG1 antibody (kappa light chain) selected from the HuCAL phage display library and expressed in a human cell line.This antibody is supplied as a liquid.
Purified IgG prepared by affinity chromatography on Protein A
Buffer Solution
Phosphate buffered saline
Preservative Stabilisers
0.01% Thiomersal
Omalizumab/IgE complex
The intrinsic affinity of the monovalent form of this antibody is KD = 0.58 nM as measured by real time, label free molecular interaction analysis on immobilized omalizumab in complex with human IgE.
Approx. Protein Concentrations
IgG concentration 0.5 mg/ml
For research purposes only
12 months from date of despatch
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.
Xolair is a trademark of Novartis.

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.

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 ELISA to detect the omalizumab/IgE complex or to detect omalizumab bound to immobilized IgE.
Protocol: PK antigen capture ELISA to measure bound drug exclusively.

Description Product Code Applications Pack Size List Price Your Price Quantity
LYNX Rapid HRP Antibody Conjugation Kit LNK002P CJ 3 Conjugations For 400µg Antibody
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Description LYNX Rapid HRP Antibody Conjugation Kit
Hispec Assay Diluent BUF049A E IY 50 ml
List Price Your Price
Description Hispec Assay Diluent
Human anti Omalizumab HCA236 E 0.1 mg loader
List Price Your Price
Description Human anti Omalizumab
Human anti Omalizumab (Drug/Target Complex) HCA238 E 0.1 mg loader
List Price Your Price
Description Human anti Omalizumab (Drug/Target Complex)
Human anti Omalizumab HCA235 E 0.1 mg loader
List Price Your Price
Description Human anti Omalizumab
Recombinant Human IgE Lambda HCA171 E 0.1 mg loader
List Price Your Price
Description Recombinant Human IgE Lambda
Recombinant Human IgE Kappa HCA190 E 0.1 mg loader
List Price Your Price
Description Recombinant Human IgE Kappa

References for Omalizumab antibody

  1. Harth, S. et al. (2019) Generation by phage display and characterization of drug-target complex-specific antibodies for pharmacokinetic analysis of biotherapeutics.
    MAbs. 11 (1): 178-190.

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.


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Please Note: All Products are "FOR RESEARCH PURPOSES ONLY"