| 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 the kininogens. 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 cystatin locus on chromosome 20 contains the majority of the type 2 cystatin genes and pseudogenes. This gene is located in the cystatin locus and encodes a secreted thiol protease inhibitor found at high levels in saliva, tears and seminal plasma. |
| Source : |
E. coli |
| Species : |
Human |
| Tag : |
His |
| Form : |
Freeze-dried powder |
| Molecular Mass : |
15kDa as determined by SDS-PAGE reducing conditions. |
| Protein length : |
Trp21~Ala141 (Accession # P09228) |
| Endotoxin : |
<1.0EU per 1ug (determined by the LAL method) |
| Purity : |
>95% |
| Applications : |
SDS-PAGE; WB; ELISA; IP. |
| Stability : |
The thermal stability is described by the loss rate. The loss rate was determined by accelerated thermal degradation test, that is, incubate the protein at 37°C for 48h, and no obvious degradation and precipitation were observed. The loss rate is less than 5% within the expiration date under appropriate storage condition. |
| Storage : |
Avoid repeated freeze/thaw cycles. Store at 2-8°C for one month. Aliquot and store at -80°C for 12 months. |
| Storage buffer : |
Supplied as liquid form in Phosphate buffered saline(PBS), pH 7.4. |
| Reconstitution : |
Reconstitute in sterile PBS, pH7.2-pH7.4. |
| Isoelectric Point : |
5.6 |
