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Exocell's Cystatin C ELISA kits are designed for the quantitative measurement of Cystatin C in urine but can also be used in cell culture supernatant, saliva, and serum.

Our Cystatin C ELISA's use recombinant Cystatin C as standard and a polyclonal antibody raised against recombinant Cystatin C. This antibody does not react with albumin or igG either on our ELISA's or on Western Blot. Natural Cystatin C showed dose-response curves that were parallel to the standard curves indicating that our kits can be used to determine relative levels of native Cystatin C. The assay is conducted in an indirect competitive mode and the results are reported as ng/ml (human, mouse, rat) Cystatin C.       

About Cystatin C
Cystatin C is a small protein that is produced throughout the entire body at a constant rate. It is not greatly affected by muscle mass, race, or diet and because of this- Cystatin C can be considered a more reliable & sensitive biomarker than creatinine for glomerular filtration rate (GFR) . The kidneys typically filter Cystatin C to keep levels stable. If the level of Cystatin C in blood is high, the kidneys may not be functioning properly.