Substrate Incubation
Patient serum is applied to the Colorzyme® slide, where autoantibodies bind to antigens on Immuno Concepts’ proprietary substrates.
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Immuno Concepts' Colorzyme® test kits bring the reliability of our substrate production to a colorimetric format that any laboratory can read on a standard light microscope, no fluorescence equipment required.
Our Process
Straightforward by design. Reliable by decades of research. This is how Colorzyme® test systems work.
Patient serum is applied to the Colorzyme® slide, where autoantibodies bind to antigens on Immuno Concepts’ proprietary substrates.
An enzyme-conjugated secondary antibody is followed with color reagent powder (CRP), triggering a stable, permanent chromogenic reaction wherever autoantibodies are present.
Your team reads the Colorzyme® diagnostic assay result under a standard brightfield microscope, where each permanent color deposit indicates a diagnosis.
Our Solutions
Every Colorzyme® assay in our portfolio is produced using the same proprietary technology, engineered in-house, validated lot by lot, and built to perform consistently across every run.
HEp-2000® uses a patented HEp-2 cell line genetically engineered to increase sensitivity to SS-A/Ro autoantibodies without affecting any other ANA pattern, is available in a Colorzyme® slide format. A critical advantage in conditions where SS-A/Ro positivity is frequently overlooked.
The original HEp-2 substrate blend that built Immuno Concepts’ identity is available as a Colorzyme® slide. Trusted for decades and produced to the same exacting standards, delivering reliable ANA pattern detection without fluorescence equipment.
The most widely recognized substrate for anti-DNA autoantibody detection in Colorzyme® diagnostic assay format. An established reference method for confirming anti-DNA positivity in patients with suspected systemic lupus erythematosus (SLE), accessible without a fluorescence microscope.

Why Choose Us
Colorzyme® assays were developed for laboratories that want the diagnostic depth of indirect immunoassay testing without the overhead of fluorescence microscopy. Here's what makes every Colorzyme® test system different:
Our substrates are produced in-house using proprietary cell culture and tissue processes, ensuring superior morphology and fluorescence clarity across every run.
01Our patented color reagent binds permanently at sites of autoantibody activity. This produces a stable chromogenic deposit that remains consistent, regardless of light source and optical filter configuration.
02Chromogenic deposits on Colorzyme® slides do not degrade over time. Results can be archived, reviewed, and shared for teleconsultation without any loss of pattern integrity, unlike fluorescent preparations, which photobleach on exposure to light.
03Colorzyme® test kits are not an afterthought. They are a direct extension of the manufacturing discipline, expertise, and quality standards that have made Immuno Concepts a trusted name in diagnostic immunoassay production.
Each lot of Colorzyme® assays is validated against reference sera before shipment. If a lot does not meet our quality thresholds, it does not leave our facility.
Our substrate preparation processes are developed and controlled in-house, giving us direct oversight of the substrate quality that defines your result.
Every laboratory is different. We work with you to configure Colorzyme® test systems that fit your testing volume, clinical priorities, and existing workflow.
We provide training, online tutorials, and ongoing education to help your team get the most from every Colorzyme® diagnostic assay in your workflow.
Our international distribution network ensures laboratories everywhere have access to our full range of Colorzyme® test kits and the technical support to back them up.
Whether you're expanding your autoimmune testing capabilities, reducing equipment overhead, or looking for a more accessible alternative to fluorescence-based methods, Colorzyme® test kits deliver the diagnostic precision your laboratory demands.