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ELISpot & ELISA Assay Kits for Biomedical Research
Exreprotein LLC is a trusted ELISA kit manufacturer delivering high-performance ELISA test kits, ELISA diagnostic kits (RUO), and ELISpot kits for life science and biomedical research. Whether quantifying cytokines or analyzing single-cell immune responses, our immunoassay solutions deliver the sensitivity, accuracy, and reliability required for modern biomedical research.
Our research-grade immunoassays enable precise cytokine detection, biomarker quantification, immune profiling, and cell function analysis across immunology, inflammation, and cell therapy workflows.
From a classic human interferon gamma ELISA kit to advanced single-cell ELISpot assays or fully custom ELISA kits, our products are developed with validated reagents, optimized protocols, and rigorous quality control to ensure reliable, reproducible results. All kits are provided for Research Use Only (RUO) and are not intended for clinical or diagnostic use.
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ELISA Kits for Cytokine and Biomarker Detection
ELISA (enzyme-linked immunosorbent assay) remains the gold standard for quantitative protein measurement in biomedical research. Our ELISA test kits support the detection of:
- Cytokines
- Chemokines
- Growth factors
- Acute-phase proteins
- Immune biomarkers
Each kit includes precoated plates, matched antibody pairs, recombinant standards, and optimized reagents to minimize variability and improve assay consistency.
How Our ELISA Assay Kits Work
Our sandwich ELISA format ensures high specificity and sensitivity, especially for low-abundance biomarkers.
Standard Workflow
- Capture antibody: Immobilized on the plate binds the target analyte.
- Sample addition: Biological samples (serum, plasma, supernatant) are incubated.
- Detection antibody: Binds a second epitope on the target.
- Enzyme reaction: Substrate conversion yields a measurable colorimetric or chemiluminescent signal.
- Quantitation: A standard curve generated with recombinant protein standards allows accurate concentration determination.
This streamlined design allows accurate, reproducible quantification across a broad dynamic range.
ELISpot Kits for Single-Cell Immune Analysis
ELISpot kits measure cytokine secretion at the single-cell level, enabling researchers to quantify the number of functional immune cells responding to stimulation.
Unlike ELISA, which measures bulk protein levels, ELISpot reveals functional cell frequencies. These assays are ideal for:
- Vaccine response studies
- T cell profiling
- Immunotherapy research
- Immune monitoring
- Preclinical evaluation
Choose the Right ELISA or ELISpot Kit
Sensitivity and Dynamic Range
Select kits that match expected analyte concentrations.
Specificity
Use validated matched antibody pairs to minimize cross-reactivity.
Sample Compatibility
Confirm validation for serum, plasma, or supernatants.
Reproducibility
Look for low intra- and inter-assay variability with lot-to-lot consistency.
As an experienced ELISA kits manufacturer, Exreprotein LLC validates every batch to ensure dependable performance.
Custom ELISA Kits and Assay Development
Beyond catalog products, Exreprotein LLC offers custom ELISA kits and custom ELISpot kits tailored to specific biomarkers and experimental workflows.
Custom Capabilities
- Antibody screening and validation
- Sensitivity and specificity optimization
- Recombinant protein standard production
- Sample matrix validation
- Assay transfer and technical documentation
Ideal Applications
- Novel or proprietary biomarkers
- Engineered or variant proteins
- Specialized research workflows
- Screening and translational studies
Each custom assay kit is developed under the same quality systems as our commercial products.
Quality Control and Manufacturing Standards
All assay kits, ELISA test kits, ELISA diagnostic kits (RUO), and ELISpot kits undergo comprehensive quality testing, including:
- Antibody-specific verification
- Standard curve linearity and accuracy
- Low intra- and inter-assay coefficient of variation
- Stability and consistency testing
These measures ensure reliable performance across experiments and timepoints.