The library is organized into three working categories. Each addresses a different stage of assay planning, from understanding the underlying chemistry to narrowing a catalog search by species or biomarker class.
Explanations of sandwich ELISA chemistry, plate-based detection principles, and the general workflow logic shared across kit formats. These guides describe how absorbance-based quantification works mechanically, including capture antibody coating, detection antibody conjugation, and substrate development, without describing any single product's validation data. Start with the sandwich ELISA methodology article or the methodology overview page.
Guidance on matching kit format to organism and sample type, covering serum, plasma, and tissue lysate considerations across human and veterinary research contexts. These resources help narrow a multi-species catalog before comparing individual kits. See choosing the right kit for species and sample type, comparing human and veterinary applications, and navigating a multi-species catalog.
Background on major biomarker groups represented in the catalog, including acute phase proteins, renal and metabolic markers, and immunoglobulin subclasses, organized by research area rather than by product. Related reading includes acute phase proteins, kidney injury biomarkers, and immunoglobulin subclass panels.
Each category links forward into the catalog: browse by human ELISA kits, veterinary and animal kits, or immunoglobulin antibody kits once the relevant biomarker group and species have been identified.
The table below connects three biomarker groups represented in the catalog to the general research areas where they commonly appear in the literature. This mapping is organizational, intended to help identify a relevant category and starting point for further reading. It is not a diagnostic guide and does not indicate clinical interpretation for any specific sample or subject.
Protocols vary by kit format and research question, but most sandwich ELISA workflows follow a consistent sequence of stages. The outline below describes the general shape of that sequence for planning purposes; it is not a step-by-step protocol for any specific kit.
Define the research question, target species, sample type, and expected concentration range before selecting a kit. This stage often involves comparing species-specific formats and confirming sample compatibility, covered in the species and sample type guide.
Reconstitute standards, dilute buffers, and prepare the calibration curve components according to the kit's documentation. Calibration accuracy at this stage directly affects the reliability of downstream absorbance-to-concentration conversion.
Prepare serum, plasma, or lysate samples according to the recommended dilution scheme, keeping handling and storage conditions consistent across replicates. Sample preparation considerations vary by matrix and are discussed further in the sample preparation article.
Add samples and standards to the capture-antibody-coated plate, incubate, wash, apply the detection antibody and substrate, and stop the reaction at the specified time point. Timing consistency across wells is a common source of inter-well variability.
Record absorbance values on a microplate reader at the wavelength specified for the assay format, generally shortly after the stop solution is added to minimize signal drift.
Fit the standard curve, back-calculate sample concentrations, and apply any dilution factors before reporting results. Reviewing the underlying detection chemistry at this stage can help contextualize unexpected values; see the sandwich ELISA methodology background.