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SPR & BLI Binding Assays Services

High-Throughput, Real-Time Surface Plasmon Resonance (SPR) and Bio-Layer Interferometry (BLI) Analysis

WuXi Biologics CRO Services offers SPR & BLI services to deliver high-throughput, real-time analysis of biomolecular interactions. We generate reliable ka, kd, and KD data to support affinity characterization, binding kinetics, koff ranking, epitope binning, dual binding for bispecific antibodies, and Fc receptor analysis across therapeutic antibodies, ADCs, and other biologic modalities.

CORE STRENGTH

SPR & BLI Binding Assays Service Highlights:

Advanced SPR Assay Platform

Backed by 6 Biacore 8K/8K+, 3 Biacore T200, and 1 Carterra LSA, supporting 100,000+ interactions and 200+ targets

Broad SPR & BLI Service Applications

Support affinity characterization, koff ranking, epitope binning, dual binding, and Fc receptor analysis

High-Throughput Capabilities

Enable rapid, efficient lead screening, ranking, and optimization across drug discovery stages

Broad Biologics Experience​

Support antibodies, bispecifics, ADCs, and other complex modalities

Service Details

Detailed SPR & BLI Service Details & Applications

01

Binding Assay

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  • SPR: Protein-protein/peptide/small molecule binding affinity, bioactivity quality control for protein production, koff ranking for lead optimization, and HTP screening for lead identification
  • BLI: Protein-protein/peptide/small molecule binding affinity, and bioactivity quality control for protein production
02

Dual Binding Assay

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  • SPR: Simultaneous binding for bispecific & trispecific antibodies
03

Competition Assay

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  • SPR: Competition of multiple ligand binding against a single receptor​
04

Epitope Binning Assay

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  • SPR: High-throughput pairwise binning
05

Fc Receptor Binding Assay

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  • SPR: Full panel of Fc receptors binding for effector function assessment and Fc-engineered antibody characterization
06

Other Testing

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  • BLI: Titer measurement, screening, complex binding, and additional studies as needed

 

Note: For SPR analysis, we offer assay setup, single-concentration analysis, full kinetics measurement, and custom assay development; for BLI analysis, we offer full kinetics measurement and custom assay development.

Case Studies

Case Studies: SPR & BLI Analysis for Biologics Drug Discovery and Characterization​

High-Throughput Biacore SPR Assays for Rapid Ranking of Soluble TCRs from Crude Supernatants

This case study highlights a high-throughput SPR analysis workflow for rapid early-stage screening directly from crude supernatants. Using only 100 μL per sample, SPR binding assay generates affinity and kinetics data to support rapid lead identification and screening, with strong correlation to results from purified-samples.

Surface Plasmon Resonance (SPR)-Based Epitope Binning for Antibody Classification and Lead Differentiation
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This case study demonstrates how HTP SPR protein analysis using Carterra LSA supports 34 × 34 pairwise epitope binning. Using premix competition assay design, the workflow generates SPR sensorgrams, competition matrix heat maps, and dendrogram-based blocking analysis to identify bins with antibody communities, guiding lead selection.

Bio-Layer Interferometry (BLI) Assays for Real-Time, High-Throughput Titer Measurement
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This case study highlights how BLI services support real-time, label-free binding analysis through wavelength shifts at the biosensor surface. In addition to interaction characterization, BLI assays enable high-throughput titer measurement, supporting faster screening and characterization in biologics drug discovery.

Why WuXi Biologics

Why Work with WuXi Biologics for SPR & BLI Binding Assays

  • Proven Assay Expertise: Extensive experience in SPR and BLI assay design and development across diverse molecule types
  • High-Throughput Capabilities: Built to support fast, data-driven lead screening, ranking, and optimization across key drug discovery stages
  • Extensive Interaction Experience: Backed by 100,000+ interactions and 200+ targets analyzed
  • Fit-for-Purpose Platform Selection: Applies Biacore 8K/8K+, Biacore T200, Carterra LSA, and Octet to tailored applications

Get Started

Move from SPR & BLI Binding Data to Better Discovery Decisions

Advance your biologics programs with our SPR and BLI binding assays services designed to generate clear, high-quality interaction data from hit screening through lead optimization. Covering affinity characterization, binding kinetics, koff ranking, epitope binning, dual binding for bispecific antibodies, and Fc receptor analysis, we help translate binding data into better biologics drug discovery decisions.