Anti-Stefin B/CSTB Antibody Picoband®
Primary Antibody supplied by Boster Bio Read more ›

Product Description
Cystatin B (CSTB), also called STFB, is a small protein that is a member of the superfamily of cysteine protease inhibitors. It has been isolated from human spleen and liver and its amino acid sequence has been fully determined. The cystatin B gene is located on 21q22.3. It is widely distributed and is localized mostly intracellularly, but has been found extracellularly. The protein is able to form a dimer stabilized by noncovalent forces, inhibiting papain and cathepsins l, h and b. Its role is thought to be as a protector against the proteinases leaking from lysosomes. A cystatin B multiprotein complex might have a specific cerebellar function, and that the loss of this function might contribute to the etiopathogenesis of EPM1. Upon differentiation to myotubes, CSTB becomes excluded from the nucleus and lysosomes, suggesting that the subcellular distribution of CSTB is dependent on the differentiation status of the cell.
Product information
| Supplier | Boster Bio |
|---|---|
| ABMIUM evidence status | ABMIUM Verified™ collaborator-tested data |
| Catalogue reference | PB9565 |
| Product category | Primary Antibodies |
| Reactive species | Human |
| Tested applications | ELISA, Flow Cytometry, IF/ICC, IHC, IHC-P, WB |
| Available conjugations | Unconjugated, Biotin, Cy3, Fluoro488, Fluoro550, Fluoro594, FITC, HRP, APC, PE, Fluoro647 |
| Gene name | CSTB |
| Protein name | Cystatin-B |
| Specificity | No cross reactivity with other proteins. |
| Immunogen | E. coli-derived human Stefin B recombinant protein (Position: M1-F98). Human Stefin B shares 78.6 % amino acid (aa) sequence identity with both mouse and rat Stefin B. |
| Host | Rabbit |
| Clonality | Polyclonal |
| Isotype | Rabbit IgG |
| Purification | Immunogen affinity purified. |
| Storage | Store at -20℃ for one year from date of receipt. After reconstitution, at 4℃ for one month. It can also be aliquotted and stored frozen at -20℃ for six months. Avoid repeated freeze-thaw cycles. |
| UniProt | P04080 |
| NCBI Gene ID | 1476 |
Available variants
| Conjugation | Size |
|---|---|
| Unconjugated | 100 μg/vial |
| Biotin | 100 μg/vial |
| Cy3 | 100 μg/vial |
| Fluoro488 | 100 μg/vial |
| Fluoro550 | 100 μg/vial |
| Fluoro594 | 100 μg/vial |
| FITC | 100 μg/vial |
| HRP | 100 μg/vial |
| APC | 100 μg/vial |
| PE | 100 μg/vial |
| Fluoro647 | 100 μg/vial |
Key Facts
| Target | Cystatin-B |
| Also known as | CPI B; CST6; CSTB; Cystatin B; cystatin B (stefin B); EPM1; PME; Stefin B; STFB |
| Concentration | Adding 0.2 ml of distilled water will yield a concentration of 500 μg/ml. |
| Species reactivity | Human |
| Observed band | 11 kDa |
| Purity | No cross reactivity with other proteins. |
| Form / buffer | Lyophilized |
| Shelf life | Store at -20℃ for one year from date of receipt. After reconstitution, at 4℃ for one month. It can also be aliquotted and stored frozen at -20℃ for six months. Avoid repeated freeze-thaw cycles. |
| Host species | Rabbit |
| Clonality | Polyclonal |
| Isotype | Rabbit IgG |
| Conjugation | Unconjugated|Biotin|Cy3|Fluoro488|Fluoro550|Fluoro594|FITC|HRP|APC|PE|Fluoro647 |
| Non-cross-reactive with | No cross-reactivity with other proteins |
| Tested applications |
ELISAFlow CytometryIF/ICCIHCIHC-PWB |
| Dilution range | Western blot, 0.1-0.5μg/ml, Human Immunohistochemistry (Paraffin-embedded Section), 0.5-1μg/ml, Human Immunocytochemistry/Immunofluorescence, 5 μg/ml, Human Flow Cytometry (Fixed), 1-3μg/1x106 cells, Human ELISA, 0.1-0.5μg/ml, - |
| Immunogen | E. coli-derived human Stefin B recombinant protein (Position: M1-F98). Human Stefin B shares 78.6 % amino acid (aa) sequence identity with both mouse and rat Stefin B. |
| Purification | Immunogen affinity purified. |
Reactivity & Application Validation
1 species| Species | WB | IHC | IHC-P | IHC-F | IF/ICC | FLOW CYTOMETRY | ELISA | IP |
|---|---|---|---|---|---|---|---|---|
| Human |
Specifications
Immunohistochemistry (Paraffin-embedded Section), 0.5-1μg/ml, Human
Immunocytochemistry/Immunofluorescence, 5 μg/ml, Human
Flow Cytometry (Fixed), 1-3μg/1x106 cells, Human
ELISA, 0.1-0.5μg/ml, -
Storage & Stability
*This antibody is supplied in a stabilized formulation.
Compatibility with conjugation reactions depends on the chemistry of the conjugation method used.
For conjugation methods that are not compatible with the stabilizing components present in this formulation, a carrier-free antibody format is required.
Compliance & Certifications
Not intended for diagnostic or therapeutic use.