SerpinB9 Antibody (7D8) - BSA Free

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Product Details

Summary
Reactivity Hu, Mu(-), Po(-)Species Glossary
Applications WB, Flow, IHC, IHC-Fr, IHC-P
Clone
7D8
Clonality
Monoclonal
Host
Mouse
Conjugate
Unconjugated
Format
BSA Free
Concentration
1.0 mg/ml

Order Details

SerpinB9 Antibody (7D8) - BSA Free Summary

Immunogen
Recombinant PI-9 produced in P. pastoris.
Specificity
NB100-64359 is specific for human PI-9 (proteinase inhibitor 9), also known as SerpinB9, a 42kDa intracellular nucleocytoplasmic serpin expressed in cytotoxic lymphocytes (CTLs), natural killer (NK) cells, monocyte-derived dendritic cells (DCs), and to a lesser extent in B cells and myeloid cells. Granzyme B (grB) is a serine protease highly expressed by CTLs and NK cells, which is endocytosed by virus-infected and malignant target cells. The subsequent release of grB from the endocytic vesicles into the cytoplasm of the target cells, triggers grB-mediated apoptosis, through cleavage of various cytoplasmic or nuclear proteins. PI-9, up-regulated in response to grB production and degranulation, has been identified as a potent inhibitor of Granzyme B-mediated apoptosis, providing a vital self-protection mechanism against the premature apoptosis of CTLs and NK cells by grB, which may escape into the cytoplasm of the effector cells themselves. Clone 7D8 detects a band of approximately 42kDa under reducing conditions. Clone 7D8 is suitable for use in indirect Immunofluorescence (2).
Isotype
IgG1
Clonality
Monoclonal
Host
Mouse
Gene
SERPINB9
Purity
Protein G purified
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Applications/Dilutions

Dilutions
  • Flow Cytometry 1:10-1:100
  • Immunohistochemistry 1:10-1:500
  • Immunohistochemistry-Frozen 1:10-1:500
  • Immunohistochemistry-Paraffin 1:50
  • Western Blot 1:100-1:2000
Application Notes
Membrane permeabilisation is required for this application Flow Cytometry. This product requires antigen retrieval using heat treatment prior to staining of paraffin sections. Sodium citrate buffer pH 6.0 is recommended for this purpose.

Reactivity Notes

Reacts with Human. Does not react with Pig or Mouse.

Packaging, Storage & Formulations

Storage
Store at 4C short term. Aliquot and store at -20C long term. Avoid freeze-thaw cycles.
Buffer
PBS
Preservative
0.05% Sodium Azide
Concentration
1.0 mg/ml
Purity
Protein G purified

Alternate Names for SerpinB9 Antibody (7D8) - BSA Free

  • CAP-3
  • CAP3PI-9
  • Cytoplasmic antiproteinase 3
  • Peptidase inhibitor 9
  • PI9protease inhibitor 9 (ovalbumin type)
  • serine (or cysteine) proteinase inhibitor, clade B (ovalbumin), member 9
  • serpin B9
  • serpin peptidase inhibitor, clade B (ovalbumin), member 9
  • serpin peptidase inhibitor, clade B, member 9

Background

SerpinB9 is a serine proteinase inhibitor of the ovalbumin like B clade of serpins. The mouse orthologue to PI9 is SPI-6. SerpinB9 was first discovered in human bone marrow in a search for serpins similar to SerpinB6. SerpinB9 was identified in lymphocytes, especially natural killer cells and cytotoxic T lymphocytes, cells which also produce and store the apoptosis-inducing enzyme Granzyme B. PI9 was shown to be a potent inhibitor of Granzyme B, working at picamolar efficiencies. PI9 was also shown to inhibit caspase 1, the interleukin 1 converting enzyme, thus blocking IL1beta production, and decreasing inflammatory processes. Most leukemia cells and many tumor cells produce PI9, leading to speculation that PI9 may help protect tumor cells from destruction by NK and CTL cells. PI9 is also found in placenta, lung, kidney, mast cells, and many tissues and cell lines. In kidney transplant, PI9 is sharply elevated, and in the liver PI9 has been shown to be upregulated by a downstream estrogen promoter. SerpinB9 inhibits Granzyme B, and is cleaved by Granzyme M, as a down regulatory step. SerpinB9 also inhibits the bacterial proteinase subtilisin A, and this may be a protective agent against infections. Neutrophil elastase is also a target of SerpinB9. Like SerpinB6 and SerpinB8, SerpinB9 lacks a signal sequence, and is found mainly in the cytoplasm and nucleus, although it can be detected outside of cells and in serum. The original SerpinB9 sequence described was 379 amino acids in length, with predicted mass of 42.4 kDa and pI of 5.51.

Limitations

This product is for research use only and is not approved for use in humans or in clinical diagnosis. Primary Antibodies are guaranteed for 1 year from date of receipt.

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Bioinformatics

Gene Symbol SERPINB9
Entrez
Uniprot