Neutralizing Antibody (NAb) Assays

Celerion provides NAb solutions for all modalities with expertise across competitive ligand binding, cell-based, and enzymatic methods.


Celerion scientist preparing an immunoassay plate at the bench

Our scientific experts develop and validate phase appropriate NAb methods to meet regulatory expectations for your therapeutic program.


NAb assays are an important component of immunogenicity testing, and selecting the appropriate format is critical. At Celerion, we have the expertise to support you with:

  • Competitive ligand binding methods
  • Cell based methods
  • Enzymatic methods

Competitive ligand binding (cLB) NAb Assay Services


At Celerion, we have extensive hands-on experience developing assays for antagonistic antibody therapeutics, including cLB NAb assays. Our scientific teams leverage our ELISA and ECL capabilities, including labeling and characterizing custom reagents, to ensure robust, sensitive cLB methods are in place for NAb sample testing.

Molecular Devices SpectraMax microplate reader used for assay detection

Celerion scientist handling cell cultures in a laminar flow hood

Cell-based NAb Assay Services


Our specialized cell-based assay teams are well versed in the unique challenges that come with these high complexity methods, enabling us to take a strategic approach to assay design to maximize drug tolerance and sensitivity. We utilize trusted vendors for sourcing and screening appropriate cell lines and produce high-quality cell banks in house.

Enzymatic NAb Assay Services


Biologics that function through catalytic or enzymatic activity often require a unique, customized design for NAb testing. Partner with a CRO that understands how to best leverage enzymatic methods to create the appropriate solution for your immunogenicity testing strategy.

Celerion scientist preparing sample tubes for analysis

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