Human HAI-2 Antibody Summary
Ala28-Lys197
Accession # O43291
Applications
Please Note: Optimal dilutions should be determined by each laboratory for each application. General Protocols are available in the Technical Information section on our website.
Scientific Data
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Detection of HAI-2 by Western Blot Expression analysis of matriptase, HAI-1, HAI-2, and prostasin in B cancer cells by reverse-transcription/qPCR (a,b), western blotting (c–e), and flow cytometry (f). (a) Bar graph of relative mRNA expression levels of matriptase (Mat), HAI-1, HAI-2, prostasin (Pro) in Daudi (n = 4), Namalwa (n = 5), Ramos (n = 3), Raji (n = 3), JeKo-1 (n = 3), and RS4;11 cells (n = 2) using GAPDH as the reference. The prostasin bars do not appear in the bar graph, as the actual qPCR readouts were registered as “N/A” by the instrument. (b) Bar graph of mRNA quantity ratio of HAI-2 to matriptase after normalization with the GAPDH level in each cell line in (a). (c) Western blotting images of matriptase (Ab: A300-221A), HAI-2, and GAPDH. Twenty micrograms of total protein from the cell lysate of each individual culture (including 2 repeats) were analyzed. Daudi, lanes 1–3; Namalwa, lanes 4–6; Ramos, lanes 7–9. Top panel, matriptase (Mat); middle panel, HAI-2; bottom panel, GAPDH. (d) Densitometry bar graph of relative protein quantities of matriptase and HAI-2 using GAPDH as the reference. (e) The quantitative ratio of HAI-2 to matriptase in each cell line. (f) Flow cytometry histogram of matriptase expression evaluation in Ramos cells. The Ramos cells (4 × 105) were labeled with the matriptase antibody as described in the Materials and Methods section. The matriptase-positive cells are shown in the PE-A subset (blue peak). Cells without the matriptase antibody labeling (red peak) were not detected in the PE-A subset and were used as the gating control. Image collected and cropped by CiteAb from the following open publication (https://pubmed.ncbi.nlm.nih.gov/37568664), licensed under a CC-BY license. Not internally tested by R&D Systems.
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Detection of HAI-2 by Western Blot Expression analysis of matriptase, HAI-1, HAI-2, and prostasin in B cancer cells by reverse-transcription/qPCR (a,b), western blotting (c–e), and flow cytometry (f). (a) Bar graph of relative mRNA expression levels of matriptase (Mat), HAI-1, HAI-2, prostasin (Pro) in Daudi (n = 4), Namalwa (n = 5), Ramos (n = 3), Raji (n = 3), JeKo-1 (n = 3), and RS4;11 cells (n = 2) using GAPDH as the reference. The prostasin bars do not appear in the bar graph, as the actual qPCR readouts were registered as “N/A” by the instrument. (b) Bar graph of mRNA quantity ratio of HAI-2 to matriptase after normalization with the GAPDH level in each cell line in (a). (c) Western blotting images of matriptase (Ab: A300-221A), HAI-2, and GAPDH. Twenty micrograms of total protein from the cell lysate of each individual culture (including 2 repeats) were analyzed. Daudi, lanes 1–3; Namalwa, lanes 4–6; Ramos, lanes 7–9. Top panel, matriptase (Mat); middle panel, HAI-2; bottom panel, GAPDH. (d) Densitometry bar graph of relative protein quantities of matriptase and HAI-2 using GAPDH as the reference. (e) The quantitative ratio of HAI-2 to matriptase in each cell line. (f) Flow cytometry histogram of matriptase expression evaluation in Ramos cells. The Ramos cells (4 × 105) were labeled with the matriptase antibody as described in the Materials and Methods section. The matriptase-positive cells are shown in the PE-A subset (blue peak). Cells without the matriptase antibody labeling (red peak) were not detected in the PE-A subset and were used as the gating control. Image collected and cropped by CiteAb from the following open publication (https://pubmed.ncbi.nlm.nih.gov/37568664), licensed under a CC-BY license. Not internally tested by R&D Systems.
Reconstitution Calculator
Preparation and Storage
- 12 months from date of receipt, -20 to -70 °C as supplied.
- 1 month, 2 to 8 °C under sterile conditions after reconstitution.
- 6 months, -20 to -70 °C under sterile conditions after reconstitution.
Background: HAI-2
Two alternatively spliced forms of HAI-2 have been found in human tissues (1). HAI-2A, the full-length molecule and also known as placental bikunin, is a major form expressed in human tissues. Encoded by the SPINT2 gene, HAI-2A consists of two Kunitz domains, and a C-terminal transmembrane domain (1-5). Both Kunitz domains can function as inhibitors independent of each other. In addition to HGF activator and trysin, HAI-2A strongly inhibits plasmin, tissue and plasma kallikreins, and factor XIa. In comparison, HAI-2A is a weaker inhibitor of factor VIIa-tissue factor, factors IXa, Xa, and XIIa. Recombinant HAI-2A prolonged the clotting time in an activated partial thromboplastin time assay.
- Kataoka, H. et al. (2002) Biochem. Biophys. Res. Comm. 290:1096.
- Kawaguchi, T. et al. (1997) J. Biol. Chem. 272:27558.
- Marlor. C.W. et al. (1997) J. Biol. Chem. 272:12202.
- Muller-Pillasch, F. et al. (1998) Biochim. Biophys. Acta 1395:88.
- Delaria, K.A. et al. (1997) J. Biol. Chem. 272:12209.
Product Datasheets
Citations for Human HAI-2 Antibody
R&D Systems personnel manually curate a database that contains references using R&D Systems products. The data collected includes not only links to publications in PubMed, but also provides information about sample types, species, and experimental conditions.
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Citations: Showing 1 - 4
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Exosome-Mediated Activation of the Prostasin-Matriptase Serine Protease Cascade in B Lymphoma Cells
Authors: Li-Mei Chen, Karl X. Chai
Cancers (Basel)
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Post-translational modifications of serine protease TMPRSS13 regulate zymogen activation, proteolytic activity, and cell surface localization
Authors: CE Martin, AS Murray, KE Sala-Hamri, JR Mackinder, EC Harrison, JG Lundgren, FA Varela, K List
The Journal of Biological Chemistry, 2021-09-22;0(0):101227.
Species: Human
Sample Types: Cell Lysates
Applications: Western Blot -
Phosphorylation of the type II transmembrane serine protease, TMPRSS13 in Hepatocyte Growth Factor Activator Inhibitor-1 and 2-mediated cell surface localization
Authors: AS Murray, FA Varela, TE Hyland, AJ Schoenbeck, JM White, LM Tanabe, SV Todi, K List
J. Biol. Chem., 2017-07-14;0(0):.
Species: Human
Sample Types: Cell Lysates
Applications: Western Blot -
Targeting the membrane-anchored serine protease testisin with a novel engineered anthrax toxin prodrug to kill tumor cells and reduce tumor burden
Authors: Erik W. Martin, Marguerite S. Buzza, Kathryn H. Driesbaugh, Shihui Liu, Yolanda M. Fortenberry, Stephen H. Leppla et al.
Oncotarget
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