Assay Ready Kits

Cell-based Assay Kits from Early Discovery to Pre-Clinical and Clinical Development to Commercial Release and Stability Programs

Eurofins DiscoverX® delivers over 1,200 optimized assay kits provided as ready-to-use (RTU) assays with frozen-ready cells, thus eliminating the need for continuous cell culture to perform cell-based functional or binding assays conveniently and confidently. These assay kits are provided in various phase-appropriate formats, from basic research and drug discovery through clinical development, and into commercial release and stability programs.

The extensive menu of target-based assays covers a broad range of target classes including GPCRs (G protein-coupled receptors); kinase, checkpoint, and cytokine receptors; intercellular signaling targets; nuclear and epigenetic proteins; and other targets. Assay-ready kits contain all the necessary reagents to perform functional or binding whole-cell assays in just a few hours, including frozen, RTU pre-validated cells, optimized detection reagents, and media, 96-well plates, and detailed protocols.

Eurofins DiscoverX offers two types of assay ready kit formats: eXpress and bioassays, that are based on the research or drug discovery and development phase:

  • eXpress Assay Kits — Suited for research purposes only, eXpress assay kits provide quick analysis and implementation in early discovery phases for screening applications, proof-of-concept, mechanism of action (MOA) confirmation, and rank-ordering studies. eXpress assay kits are not recommended or supported for use in pre-clinical development phases, including characterization or potency testing in QC lot release programs.
  • Bioassay Kits — The appropriate format to use and implement for characterization, MOA confirmation, detection of neutralizing antibodies, and potency testing in commercial release and stability applications for biologics drug development programs. The Eurofins DiscoverX bioassay kits have been developed, optimized, and several qualified with marketed drugs following International Council for Harmonization (ICH) guidelines to meet market requirements and regulatory expectations.


Minimize assay development time and eliminate lengthy, expensive, and time-consuming cell culture with quick analysis eXpress assay kits or qualified, MOA-based bioassays that are ready-to-use and ensure robust and reliable performance every time.

Product Highlights

  • Complete Kits – Over 1,200 off-the-shelf kits with cryopreserved RTU cells and all the optimized reagents you need to get you started quickly
  • Rapid and Reliable Results – Analyze multiple targets or screen and profile small and large molecules in-house using simple step-by-step, homogeneous, no-wash protocols for reliable, fast results
  • Scalable and Standard Instrumentation – High throughput, scalable format for increased efficiency and compatible on any standard luminometer with a chemiluminescent read-out
  • Phase-Appropriate Formats – Utilize quick analysis eXpress assay kits for early discovery studies, or qualified bioassays for QC lot release testing and stability studies
  • Consider Eurofins DiscoverX’s custom development capabilities for custom cell lines, assays, & enzyme development.

Target Lists Products Target List

Comprehensive Eurofins DiscoverX product list to enable your drug discovery and development programs focused on checkpoint receptors, cytokine receptors/interleukins, cytotoxicity,…

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Target Lists Cell-based Assays for Biologics Development Programs

Accelerate your biologics development from discovery to QC lot release with cell-based assays. Comprehensive list of bioassay kits, cell lines,…

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Target Lists GPCR Product Solutions

Your source for a complete offering of GPCR assays, cell lines, and membrane preps

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Target Lists Kinase and Phosphatase Product Solutions

Comprehensive Offering of Cellular Assays and Recombinant Enzymes for Drug Discovery Screening and Lead Optimization

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Videos Custom Development Capabilities

Learn about Eurofins DiscoverX cell line engineering, assay development, and recombinant enzyme production custom capabilities. Find out more about cell…

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Brochures & Flyers High-Throughput Screening & Lead Optimization Products

Robust Cell-Based Assays to Identify Therapeutic Hits Rapidly

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Brochures & Flyers Eurofins DiscoverX – Delivering Solutions from Discovery to Market

Products & Custom Development Capabilities.

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Bioassays for Biologics

Ready-to-use kits for biologics characterization, MOA confirmation, NAbs detection, stability studies, & potency testing

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eXpress™ Assay Kits

Ready-to-use kits for early discovery phases for screening, proof-of-concept, MOA confirmation, or rank-ordering studies

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CDMO/CRO Certification Program for Cell-Based Assays

Program designed to qualify CRO/CDMOs to run Eurofins DiscoverX bioassays for client downstream therapeutic efforts

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Cell Banks for Bioassays

Ensure long-term assay reproducibility with the production of bioassay cells — critical reagents for cell banks

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Custom Capabilities

Custom cell lines, kits, assays, & protein development capabilities optimized to fit your requirements

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Potency and QC Lot-Release Testing Solutions

Providing functional, MOA-based bioassays with superior lot-to-lot reproducibility

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