Enzymes for Diagnostic Kit Development

At Creative Enzymes, we provide diagnostic-grade enzymes and technical expertise that form the essential foundation of high-performance assay kits used in clinical chemistry, biochemical analysis, and molecular diagnostics.

Our enzyme solutions are engineered to meet the stringent requirements of modern in-vitro diagnostic (IVD) development — enabling manufacturers, biotech innovators, and diagnostic laboratories to design kits with exceptional precision, reproducibility, and stability.

Diagnostic assays rely on enzymes as biocatalytic engines that convert biochemical signals into measurable outputs. From colorimetric creatinine tests to enzymatic cholesterol detection, our enzyme portfolio supports both traditional wet chemistry and next-generation biosensor technologies.

Each enzyme is produced, purified, and validated under controlled processes to ensure lot-to-lot consistency, low endotoxin content, and optimal activity across physiological conditions.

Diagnostic Kit Development Supported by Creative Enzymes

Creatinine Assay Development

The creatinine assay is a cornerstone of renal function evaluation. Most modern kits employ the enzymatic creatinine method based on the coupled action of creatininase, creatinase, and sarcosine oxidase, followed by peroxidase (POD)-mediated chromogenic detection.

Creative Enzymes supplies high-purity and stabilized variants of these enzymes, optimized for:

• Linear response across physiological creatinine ranges (0.2–20 mg/dL).
• Minimal cross-reactivity with structurally related amines.
• Extended stability in liquid and dry formulations.

These enzymes enable diagnostic developers to achieve superior precision and reduced interference compared to traditional Jaffé methods.

Homocysteine Detection

Homocysteine is a critical biomarker for cardiovascular and metabolic disorders. Enzymatic assays utilize homocysteine-α,γ-lyase, S-adenosylhomocysteine hydrolase, and oxidoreductases to convert homocysteine into detectable intermediates.

Creative Enzymes offers customized enzyme variants with:

• Enhanced specificity for L-homocysteine.
• Compatibility with both spectrophotometric and fluorescence detection platforms.
• Resistance to serum matrix interference.

Our technical support includes method optimization and enzyme pairing guidance, ensuring that assay developers obtain accurate and stable readouts.

Sialic Acid Quantification

Sialic acid (N-acetylneuraminic acid) is a key indicator in cancer and inflammatory disease diagnostics.

Our neuraminidase, N-acetylneuraminate lyase, and aldolase enzymes are validated for:

• Precise cleavage and quantification of total sialic acid.
• Compatibility with microplate and automated chemistry analyzers.
• High thermostability for long-term reagent shelf life.

By using Creative Enzymes' optimized enzyme sets, manufacturers can construct assays with excellent analytical sensitivity and minimal false-positive risk.

Triglyceride Measurement

The enzymatic triglyceride assay involves lipase-mediated hydrolysis, followed by glycerol kinase and glycerol-3-phosphate oxidase (GPO) reactions that generate hydrogen peroxide detected via a peroxidase-chromogen system.

Creative Enzymes provides all key enzyme components with:

• High catalytic turnover and low background activity.
• Improved stability under wide pH and temperature ranges.
• Low residual lipase contamination to prevent spontaneous hydrolysis.

These enzymes allow developers to produce robust and reproducible assays meeting CLSI precision criteria.

Creatine Kinase (CK) Activity Assays

Creatine kinase (CK) is an essential enzyme for diagnosing myocardial and muscular disorders. Diagnostic kits typically use a forward reaction (creatine + ATP → phosphocreatine + ADP) coupled with hexokinase (HK) and glucose-6-phosphate dehydrogenase (G6PDH) for NADH detection.

Creative Enzymes supplies:

• Recombinant CK-MM and CK-MB isozymes for specific activity calibration.
• Auxiliary enzymes (HK, G6PDH) with guaranteed purity and kinetic validation.
• Custom buffer formulations to optimize enzyme synergy.

Our enzymes ensure precise activity determination and consistent diagnostic interpretation across production batches.

Cholesterol and Lipid Panel Development

Accurate measurement of total cholesterol, HDL, LDL, and triglycerides depends on highly specific enzyme reactions involving cholesterol esterase, cholesterol oxidase, and peroxidase.

We provide:

• High-stability oxidoreductases with reduced autoxidation rates.
• Activity maintained after lyophilization and reconstitution.
• Technical guidance for coupling reactions and surfactant compatibility.

These enzymes empower manufacturers to develop fully automated, low-drift assays that perform reliably across diverse analyzer platforms.

Free Fatty Acid (FFA) Assay Development

Free fatty acids are vital metabolic biomarkers. Enzymatic assays use acyl-CoA synthetase, acyl-CoA oxidase, and peroxidase cascades.

Creative Enzymes supplies diagnostic-grade enzymes featuring:

• High substrate specificity across chain lengths.
• Optimized activity under neutral and slightly basic pH.
• Low carry-over effect suitable for continuous analyzer systems.

Together, these enzymes enable quantitative and interference-free FFA detection.

Quality and Regulatory Alignment

All enzyme products for diagnostic kit development are manufactured under ISO 9001-compliant processes with documentation supporting CLSI, IFCC, and FDA IVD guidelines.

Our analytical validation includes:

• Purity verification (SDS-PAGE ≥ 95%)
• Activity reproducibility (CV < 3%)
• Endotoxin testing (< 0.1 EU/mg, LAL method)
• Accelerated stability modeling (37 °C / 14 days equivalent shelf-life prediction)

These data support seamless integration into clients' Design History Files (DHF) and Technical Documentation for regulatory submissions.

Partnering Beyond Enzymes

Beyond supplying high-quality biocatalysts, Creative Enzymes offers technical collaboration to accelerate kit development. Our scientists assist in:

• Reaction pathway optimization and enzyme selection consulting.
• Stability enhancement via protein engineering.
• Formulation design for both liquid and dry chemistry kits.
• Custom conjugation and labeling for colorimetric, fluorescent, or chemiluminescent detection systems.

By integrating scientific rigor with practical manufacturing expertise, we help diagnostic developers shorten R&D cycles and improve market competitiveness.

FAQs

• Q1. Do you provide complete diagnostic kits?

  A1. No. Creative Enzymes specializes in enzyme supply and technical support for kit developers. We do not manufacture or sell clinical diagnostic kits directly.

• Q2. What differentiates your enzymes from research-grade enzymes?

  A2. Our diagnostic-grade enzymes undergo stricter QC and QA processes, including activity reproducibility < 3 %, endotoxin < 0.1 EU/mg, and long-term stability validation. These metrics ensure compliance with IVD performance and regulatory expectations.

• Q3. Can your enzymes be customized for unique assay formats?

  A3. Yes. We offer custom enzyme engineering, including mutagenesis, conjugation, and formulation tailored to your detection platform (colorimetric, fluorescent, biosensor, or chemiluminescent).

• Q4. How do you ensure reproducibility across enzyme batches?

  A4. Each production lot is analyzed under identical reaction conditions using IFCC-aligned kinetic assays, ensuring consistent Km / Vmax profiles and standardized QC documentation.

• Q5. Do you provide technical documentation for regulatory submission?

  A5. Upon request, we provide detailed Certificates of Analysis, stability data, and method validation reports that support regulatory dossier preparation (IVDR / FDA 510(k)).

• Q6. Can you assist in developing multi-analyte panels?

  A6. Absolutely. Our enzyme specialists collaborate with clients to design multi-enzyme reaction cascades optimized for lipid, renal, and metabolic biomarker panels.

Product List