| Description : |
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 a cysteine protease inhibitor, forming tight complexes with papain and the cathepsins B, H, and L. The protein is one of the precursor proteins of cornified cell envelope in keratinocytes and plays a role in epidermal development and maintenance. Stefins have been proposed as prognostic and diagnostic tools for cancer. |
| Source : |
E. coli |
| Species : |
Human |
| Tag : |
His |
| Form : |
Lyophilized from sterile PBS, pH 7.4, 5 % trehalose, 5 % mannitol. |
| Protein length : |
Met1-Phe98 |
| Endotoxin : |
< 1.0 EU per μg of the protein as determined by the LAL method. |
| Purity : |
> 90% as determined by SDS-PAGE |
| Stability : |
Samples are stable for up to twelve months from date of receipt at -70ºC. |
| Storage : |
Store it under sterile conditions at -20ºC~-70ºC. It is recommended that the protein be aliquoted for optimal storage. Avoid repeated freeze-thaw cycles. |
| Reconstitution : |
It is recommended that sterile water be added to the vial to prepare a stock solution of 0.2 ug/ul. Centrifuge the vial at 4℃ before opening to recover the entire contents. |
