CSTB Full-Length MS Protein Standard


Product Description:

Name CSTB Full-Length MS Protein Standard
Cat# CPFL303872
Protein Namecystatin B (stefin B)
SymbolCSTB
SynonymsCST6; EPM1; EPM1A; PME; STFB; ULD
AccessionNM_000100
Cytogenetic21q22.3
Amino Acid Labeled[U- 13C6, 15N4]-L-Arg and [U- 13C6, 15N2]-L-Lys
Chemical Purity> 80% as determined by SDS-PAGE and Coomassie blue staining
Expression HostHuman HEK293 cells
Predicted MW11 kDa
Expression TrueORF CloneRC203872
DescriptionCSTB Full-Length MS Protein Standard (NP_000091), Labeled with [U- 13C6, 15N4]-L-Arginine and [U- 13C6, 15N2]-L-Lysine, was produced in human 293 cells (HEK293) with fully chemically defined cell culture medium to obtain incorporation efficiency at Creative-Proteomics. The cystatin superfamily encompasses proteins that contain multiple cystatin-like sequences. Some of the members are active cysteine protease inhibitors, while others have lost or perhaps never acquired this inhibitory activity. There are three inhibitory families in the superfamily, including the type 1 cystatins (stefins), type 2 cystatins and kininogens. This gene encodes a stefin that functions as an intracellular thiol protease inhibitor. The protein is able to form a dimer stabilized by noncovalent forces, inhibiting papain and cathepsins l, h and b. The protein is thought to play a role in protecting against the proteases leaking from lysosomes. Evidence indicates that mutations in this gene are responsible for the primary defects in patients with progressive myoclonic epilepsy (EPM1).

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