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Human Cystatin SA / CST2 Protein  pdf  pdf  pdf


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Synonym

CST2, Cystatin-2, Cystatin-SA, Cystatin-S5

Source

Recombinant Human CST2 /Cystatin-SA Protein (rhCST2 / Cystatin-SA) Trp 21 - Ala 141 (Accession # AAH62679) was produced in human 293 cells (HEK293) at ACRObiosystems.

Molecular Characterization

rhCST2 / Cystatin-SA, fused with 6×His tag at the C-terminus, has a calculated MW of 15.2 kDa. The predicted N-terminus is Trp 21. DTT-reduced Protein migrates as 15-17 kDa.

Endotoxin

Less than 1.0 EU per μg of the rhCST2 / Cystatin-SA by the LAL method.

Purity

>95% as determined by SDS-PAGE.

Formulation

Lyophilized from 0.22 μm filtered solution in 25 mM Tris and 150 mM NaCl, pH 8.0. Normally Mannitol or Trehalose are added as protectants before lyophilization.

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Reconstitution

See Certificate of Analysis for details of reconstitution instruction and specific concentration.

Storage

Avoid repeated freeze-thaw cycles.

No activity loss was observed after storage at:
In lyophilized state for 1 year (4oC); After reconstitution under sterile conditions for 3 months (-70oC).

 

SDS-PAGE


Recombinant Human CST2 /Cystatin-SA Protein
The purity of rhCST2 / Cystatin-SA was determined by DTT-reduced (+) SDS-PAGE and staining overnight with Coomassie Blue.
 
 
 

Background

Cystatin-2 (CST2) is also known as Cystatin-SA, Cystatin-S5, is a secreted thiol protease inhibitor, which belongs to the cystatin family. The type 2 cystatin proteins are a class of cysteine proteinase inhibitors found in a variety of human fluids and secretions, where they appear to provide protective functions. The CST1, CST2, CST4, and CST5 are expressed in differential, tissue-specific patterns. CST2 is expressed in submandibular and sublingual saliva but not in parotid saliva (at protein level) and is also expressed in submandibular gland and parotid gland.

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