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Pack Size:100μg/vial
Validated Species:Human
Application:IHC, WB
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Product Name Anti-Kallistatin/Serpina4 Antibody
SKU/Catalog Number PA1638
Description Rabbit IgG polyclonal antibody for Kallistatin(SERPINA4) detection. Tested with WB, IHC-P in Human.
Cite This Product Anti-Kallistatin/Serpina4 Antibody (Boster Biological Technology, Pleasanton CA, USA, Catalog # PA1638)
Replacement Item This antibody may replace the following items: sc-101902|sc-163804 from Santa Cruz Biotechnology.
Host Rabbit
Isotype N/A
Validated Species Human
Application IHC, WB

*Our Boster Guarantee covers the use of this product in the above tested applications.

**For positive and negative control design, consult "Tissue specificity" under Protein Target Info.

Recommended Detection Systems Boster recommends Enhanced Chemiluminescent Kit with anti-Rabbit IgG (EK1002) for Western blot, and HRP Conjugated anti-Rabbit IgG Super Vision Assay Kit (SV0002-1) for IHC(P).
*Blocking peptide can be purchased at $50. Contact us for more information
**Boster also offers various secondary antibodies for Immunoflourescecne and IHC. Take advantage of the buy 1 primary antibody get 1 secondary antibody for free promotion for the entire year 2018!
Immunogen A synthetic peptide corresponding to a sequence at the C-terminus of human Kallistatin(384-401aa AIKFFSAQTNRHILRFNR).
Cross Reactivity No cross reactivity with other proteins
Pack Size 100μg/vial


Clonality Polyclonal
Form Lyophilized
Contents Each vial contains 5mg BSA, 0.9mg NaCl, 0.2mg Na2HPO4, 0.05mg Thimerosal, 0.05mg NaN3.
Concentration Add 0.2ml of distilled water will yield a concentration of 500ug/ml.
Storage At -20°C for one year. After reconstitution, at 4°C for one month. It can also be aliquotted and stored frozen at -20°C for a longer time.Avoid repeated freezing and thawing.
Purification Immunogen affinity purified.
Isotype N/A

Protein Target Info (Source:

You can check the tissue specificity below for information on selecting positive and negative control.

Gene Name SERPINA4
Protein Name Kallistatin
Molecular Weight 48542 MW
Protein Function Inhibits human amidolytic and kininogenase activities of tissue kallikrein. Inhibition is achieved by formation of an equimolar, heat- and SDS-stable complex between the inhibitor and the enzyme, and generation of a small C-terminal fragment of the inhibitor due to cleavage at the reactive site by tissue kallikrein. .
Tissue Specificity Expressed by the liver and secreted in plasma.
Sequence Similarities Belongs to the serpin family.
Subcellular Localization Secreted.
Uniprot ID P29622
Alternative Names Kallistatin;Kallikrein inhibitor;Peptidase inhibitor 4;PI-4;Serpin A4;SERPINA4;KST, PI4;
Research Areas |cardiovascular|angiogenesis|inhibitors| cardiovascular|blood|serum proteins| cancer|invasion/microenvironment|angiogenic inhibitory factors| cell biology|proteolysis / ubiquitin|protease inhibitors|serine protease inhibitors|serpins|
*if product is indicated to react with multiple species, protein info is based on the human gene.

Background for Kallistatin

Serpina 4, also called Kallistatin, PI4 or TISSUE KALLIKREIN INHIBITOR, is a protein that in humans is encoded by the SERPINA4 gene. The serpina4 is a member of the serpin superfamily and represents a major inhibitor of human tissue kallikrein in the circulation. The SERPINA4 gene is localized to 14q32.13. The translated amino acid sequence of serpina4 matches the protein sequence and shares 44 to 46% sequence identity with other serpin family members. Kallistatin is a serine proteinase inhibitor(serpin) and a heparin-binding protein. It is localized in vascular smooth muscle cells and endothelial cells of blood vessels, suggesting that it may be involved in the regulation of vascular function. And serpina4 also plays a role in neointima hyperplasia.

Anti-Kallistatin/Serpina4 Antibody Images

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Anti-Kallistatin/Serpina4 Antibody
Anti-Kallistatin antibody, PA1638, IHC(P)
IHC(P): Human Liver Cancer Tissue
Anti-Kallistatin/Serpina4 Antibody
Anti-Kallistatin antibody, PA1638, Western blotting
Lane 1: SMMC Cell Lysate
Lane 2: COLO320 Cell Lysate
Lane 3: JURKAT Cell Lysate
Anti-Kallistatin/Serpina4 Antibody
Anti-Kallistatin antibody, PA1638, Western blotting
Lane 1: HELA Cell Lysate
Lane 2: SKOV Cell Lysate
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Customer Q&As

Q: Do you offer BSA-free antibodies? Keyword: Bovine serum albumin, carrier protein, conjugation
A: Yes, please contact us at for more information about BSA-free antibodies and availability. The new BSA-free formula uses trehalose as a replacement to BSA. We have tested many alternative chemicals and found that trehalose protects the antibodies the best.
Q: Is your western blot protocol provided from the website applicable for all your antibodies? Keyword: applications, WB
A: The protocol is applicable for all our antibodies in WB, the NC Membrane(0.45μm or 0.22μm) and transfer time(70 mins or 50 mins) depends on the protein molecular weight, details can be found in included protocol.
Q: Can I conjugate markers to this antibody? Can I link custom conjugates to this antibody? Keyword: conjugation
A: The antibody is stored with BSA and cannot be conjugated with markers. Carrier free antibodies are available upon request. Please contact
Q: What should I use for negative control?
A: Please contact us for negative control suggestions. You can also check expression databases such as genecards, uniprot etc. Due to logistic reasons, we do not sell serum or lysates that we use internally for positive or negative control.
Q: Where can I find troubleshooting information? What should I do if I have unexpected bands, high background, no signal, weak signal
A: You can find Boster's troubleshoot guides under tech support tab. Please contact us for further assistance on troubleshooting your experiment.
Q: What is the immunogen sequence of this antibody? Is this antibody polyclonal or monoclonal?
A: You can find the immunogen sequence under "Immunogen" and clonality in the product name.
Q: What is the expected band size? Why is it different than the observed band size?
A: The expected band size is predicted on the size of the protein. The actual band size may be affected by a few other factors including but not limited to:
1. Post-translational modification:phosphorylation, methylation, glycosylation etc. These modifications prevent SDS molecules from binding to the target protein and thus make the band size appear larger than expected
2. Post-translational cleavage: this can cause smaller bands and or multiple bands

3. Alternative splicing: the same gene can have alternative splicing patterns generating different size proteins, all with reactivities to the antibody.

4. Amino Acid R chain charge: SDS binds to positive charges. The different size and charge of the Amino Acid side chains can affect the amount of SDS binding and thus affect the observed band size.
5. Multimers: Multimers are usually broken up in reducing conditions. However if the interactions between the multimers are strong, the band may appear higher.,
Q: What is the suggested dilution ratio for Western Blot (WB), Immunohistochemistry (IHC) and or ELISA standards? What is the optimal pH for the sample?
A: Check the datasheet for the product for details on dilution ratios for different experiments. You can find the datasheet button on the right side of the product page.
Q: What is the protocol you used for your Western blotting (WB) and Immunohistochemistry (IHC)?
A: Check our protocols under the tech support tab.