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MSST0059 Sigma-Aldrich

SILuProt CST3, Cystatin C human

recombinant, expressed in E. coli, SIL MS Protein Standard, 15N-labeled

Synonym: CST3, Cystatin C



Related Categories Biochemicals and Reagents, Proteins and Derivatives, SILuProt Protein Standards for Quantitative Mass Spectrometry More...
Quality Level   200
recombinant   expressed in E. coli
assay   ≥95% (SDS-PAGE)
form   lyophilized powder
potency   ≥97% (Heavy amino acids incorporation efficiency by MS)
suitability   suitable for mass spectrometry (standard)
UniProt accession no.   P01034 (aa 27-146)
shipped in   ambient
storage temp.   −20°C
Gene Information   human ... CST3(1471)


General description

SILuProt CST3 is a recombinant, stable 15N isotope-labeled human CST3. Expressed in E. coli, it is designed to be used as an internal standard for bioanalysis of CST3 in mass-spectrometry. SILuProt CST3 is a protein of 120 amino acids, with a calculated molecular mass of 13.5 kDa.

Biochem/physiol Actions

Cystatin C is an inhibitor of cysteine proteases including cathepsin B (which has been identified as the most important ?-amyloid-degrading enzyme. Measurement of cystatin C in serum is replacing creatinine as an indicator of kidney function (glomerular filtration rate, GFR).



Physical form

Supplied as a lyophilized powder containing tris buffered saline and methionine.

Legal Information

This product is licensed under U.S. Patent No. 7,396,688 and foreign counterparts from E. I. du Pont de Nemours and Company. The purchase of this product conveys to the buyer the nontransferable right to use the purchased amount of the product for research and development only, including services for a third party for consideration. The buyer cannot sell or otherwise transfer this product, its components or materials made using this product or its components to a third party. Information about licenses for excluded uses is available from: E. I. du Pont de Nemours and Company; Attn: Associate Director, Commercial Development; DuPont Experimental Station E268; 200 Powdermill Rd.; Wilmington, DE 19803; 1-877-881-9787 (voice), 1-302-695-1437 (fax), licensing@dupont.com.

SILu is a trademark of Sigma-Aldrich Co. LLC

Safety & Documentation

Safety Information

NONH for all modes of transport
WGK Germany 
Flash Point(F) 
Not applicable
Flash Point(C) 
Not applicable


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