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CSTB antibody (PB9565) performs well in ELISA, Flow Cytometry, IF, IHC, ICC, WB and shows reactivity with Human.
- Validated for inter-lot consistency, specificity, and reproducibility
- Committed to quality since 1993
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Flow Cytometry analysis of U20S cells using anti-Stefin B antibody (PB9565).
Overlay histogram showing U20S cells stained with Stefin B (Blue line). To facilitate intracellular staining, cells were fixed with 4% paraformaldehyde and permeabilized with permeabilization buffer. The cells were blocked with 10% normal goat serum. And then incubated with rabbit anti-Stefin B Antibody (Stefin B,1μg/1x106 cells) for 30 min at 20°C. DyLight®488 conjugated goat anti-rabbit IgG (BA1127, 5-10μg/1x106 cells) was used as secondary antibody for 30 minutes at 20°C. Isotype control antibody (Green line) was rabbit IgG (1μg/1x106) used under the same conditions. Unlabelled sample without incubation with primary antibody and secondary antibody (Red line) was used as a blank control.
Overlay histogram showing U20S cells stained with Stefin B (Blue line). To facilitate intracellular staining, cells were fixed with 4% paraformaldehyde and permeabilized with permeabilization buffer. The cells were blocked with 10% normal goat serum. And then incubated with rabbit anti-Stefin B Antibody (Stefin B,1μg/1x106 cells) for 30 min at 20°C. DyLight®488 conjugated goat anti-rabbit IgG (BA1127, 5-10μg/1x106 cells) was used as secondary antibody for 30 minutes at 20°C. Isotype control antibody (Green line) was rabbit IgG (1μg/1x106) used under the same conditions. Unlabelled sample without incubation with primary antibody and secondary antibody (Red line) was used as a blank control.
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Anti-Stefin B/CSTB Antibody Picoband®
CSTB antibody
| Reactive Species | Host | Application |
|---|---|---|
| Human | Rabbit | ELISA, Flow Cytometry, IF, IHC, ICC, WB |
Tested Applications
CSTB antibody was positively detected by WB in:
human Hela whole cell, human A431 whole cellhuman A549 whole cell, human HepG2 whole cell
Suggested blocking solution with 5% non-fat milk or BSA; (*)Recommended protein loading: 20-40 ug per lane
CSTB antibody was positively detected by IHC in:
human prostatic cancer tissue
Use TE buffer pH 9.0 for antigen retrieval; (*) citrate buffer pH 6.0 is an alternative.
CSTB antibody was positively detected by ICC/IF in:
A431 cell
CSTB antibody was positively detected by FC in:
U20S cell, A431 cell
Recommend Dilution
Application
Dilution
Species
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
-
* It is recommended to optimize the amount of this reagent in each experimental system to achieve the best results.
Note: For flow cytometry (FCM), suitable for fixed cells only. Not suitable for FACS or surface flow cytometry using live cells.
Product Information
Product Name
Anti-Stefin B/CSTB Antibody Picoband®
View all CSTB Antibodies
View all CSTB Antibodies
Form
Lyophilized
Uniprot
Gene ID
Storage & Handling
Store at -20˚C for one year from date of receipt. After reconstitution, at 4˚C for one month. It can also be aliquotted and stored frozen at -20˚C for six months. Avoid repeated freeze-thaw cycles.
Host
Rabbit
Contents
Each vial contains antibody formulated with stabilizing components, 0.9 mg NaCl, 0.2 mg Na2HPO4, and 0.05 mg NaN3.
*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.
*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.
Clonality
Polyclonal
Isotype
Rabbit IgG
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.
Cross-Reactivity
No cross-reactivity with other proteins
Reconstitution
Add 0.2ml of distilled water will yield a concentration of 500ug/ml.
Observed Molecular Weight
11 kDa
Calculated Molecular Weight
11.1 kDa
Background of CSTB
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.
Cite This Product
Anti-Stefin B/CSTB Antibody Picoband® (Boster Biological Technology, Pleasanton CA, USA, Catalog # PB9565)
Antibody Homology Across Species
The results generated by this homology analysis tool for commonly used animal species are shown below. For unlisted species, please refer to the homology analysis between the immunogen sequence and the corresponding species.
A homology of ≥90% is recommended. Generally, higher homology indicates a greater potential for cross-species reactivity. However, protein expression levels may vary among different species, tissues, and cell types. Therefore, the homology analysis results are for reference only and do not guarantee antibody cross-reactivity or experimental performance.
Human
100%
High Homology
Dog
82%
Moderate Homology
Sheep
81%
Moderate Homology
Monkey
80%
Moderate Homology
Mouse
79%
Moderate Homology
Rat
79%
Moderate Homology
Rabbit
64%
Low homology
Zebrafish
55%
Low homology
Homology ≥ 90%High Homology
70% ≤ Homology < 90%Moderate Homology
Homology < 70%Low homology
Protocols
Western Blot protocol for CSTB antibody
Immunohistochemistry (IHC) protocol for CSTB antibody
Immunocytochemistry/Immunofluorescence (ICC/IF) protocol for CSTB antibody
Flow Cytometry (FC) protocol for CSTB antibody
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Product Promise
We promise Anti-Stefin B/CSTB Antibody Picoband® performs excellently in relevant applications for ELISA, Flow Cytometry, IF, IHC, ICC, WB. If it doesn't perform as promised, we will refund the product. Learn more
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PB9565
Buy one primary antibody get one 0.5ml HRP or Biotin secondary antibody for free.
*Sample sizes are prepared on demand and will take extra lead time. (cannot be conjugated)
$370.00
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We promise all of our products perform as described in datasheets.
This product is for Research Use Only. Not for use in diagnostic procedures.
Update date:
Oct 11, 2026