Cystatin C ELISA

BioMarkers | Diabetic Nephropathy | Injury and Dysfunction


The K-ASSAY®Human Cystatin C ELISA is an enzyme immunoassay for the quantitative determination of human cystatin C in fluids and cell culture supernatants.

Cystatin C is a low molecular weight (approximately 13.3 kDa) plasma protein produced by all nucleated human cells that belongs to the type 2 cystatin protease inhibitor family. The kidney is the major site (>99%) of cystatin C clearance, predomantly via glomerular filtration and catabolism in the proximal tubule.

Serum Cystatin C has been proposed as an alternative marker of renal dysfunction to serum creatinine in patients with renal impairment, including diabetic nephropathy and chronic kidney disease. Serum Cystatin C levels rise in proportion to decreased glomerular filtration rate (GFR).



Species reactivity


Sample type

Serum, plasma, saliva, urine, milk, and human cell culture supernatant

Assay type

Sandwich (quantitative)


312pg/mL – 20,000pg/mL

Detection method


Assay time



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Cystatin C ELISA - Product Insert | "Research Use Only"

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