Detects human IL-13 R alpha 2 in direct ELISAs and Western blots. In direct ELISAs, approximately 5% cross-reactivity with recombinant mouse IL-13 R alpha 2 is observed and less than 1% cross-reactivity with recombinant human IL-13 R alpha 1 is observed.
Polyclonal Goat IgG
Mouse myeloma cell line NS0-derived recombinant human IL‑13 R alpha 2 Cys22-Leu342 Accession # Q14627
Lyophilized from a 0.2 μm filtered solution in PBS with Trehalose. *Small pack size (SP) is supplied as a 0.2 µm filtered solution in PBS.
<0.10 EU per 1 μg of the antibody by the LAL method.
2.5 µg/106 cells
A375 human melanoma cell line
Blockade of Receptor-ligand Interaction
In a functional ELISA, 2-6 µg/mL of this antibody will block 50% of the binding of 100 ng/mL of Recombinant Human IL-13 (Catalog # 213‑ILB) to immobilized Recombinant Human IL-13 R alpha 2 Fc Chimera (Catalog # 614-INS) coated at 4 µg/mL (100 µL/well). At 40 μg/mL, this antibody will block >90% of the binding.
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.
Detection of Human IL‑13 R alpha 2 by Western Blot.
Western blot shows lysates of human placenta tissue and human testis tissue. PVDF membrane was probed with 0.2 µg/mL of Goat Anti-Human IL‑13 R alpha 2 Antigen Affinity-purified Polyclonal Antibody (Catalog # AF146) followed by HRP-conjugated Anti-Goat IgG Secondary Antibody (Catalog # HAF017). A specific band was detected for IL‑13 R alpha 2 at approximately 50-55 kDa (as indicated). This experiment was conducted under reducing conditions and using Immunoblot Buffer Group 1.
IL‑13 R alpha 2 was detected in immersion fixed paraffin-embedded sections of human prostate cancer tissue using Goat Anti-Human IL‑13 R alpha 2 Antigen Affinity-purified Polyclonal Antibody (Catalog # AF146) at 5 µg/mL overnight at 4 °C. Tissue was stained using the Anti-Goat HRP-DAB Cell & Tissue Staining Kit (brown; Catalog # CTS008) and counterstained with hematoxylin (blue). Specific staining was localized to glandular epithelial cells. View our protocol for Chromogenic IHC Staining of Paraffin-embedded Tissue Sections.
Detection of Human IL‑13 R alpha 2 by Simple WesternTM.
Simple Western lane view shows lysates of human placenta tissue and human testis tissue, loaded at 0.2 mg/mL. A specific band was detected for IL‑13 R alpha 2 at approximately 40 kDa (as indicated) using 10 µg/mL of Goat Anti-Human IL‑13 R alpha 2 Antigen Affinity-purified Polyclonal Antibody (Catalog # AF146) followed by 1:50 dilution of HRP-conjugated Anti-Goat IgG Secondary Antibody (Catalog # HAF109). This experiment was conducted under reducing conditions and using the 12-230 kDa separation system.
Preparation and Storage
Reconstitute at 0.2 mg/mL in sterile PBS.
The product is shipped at ambient temperature. Upon receipt, store it immediately at the temperature recommended below. *Small pack size (SP) is shipped with polar packs. Upon receipt, store it immediately at -20 to -70 °C
Stability & Storage
Use a manual defrost freezer and avoid repeated freeze-thaw cycles.
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: IL-13 R alpha 2
Two type1 membrane proteins belonging to the hemopoietin receptor family have been cloned and shown to bind IL-13 with differing affinities. The lower affinity IL-13 binding protein, previously designated IL-13 R alpha, IL-13 R alpha l or NR4, is now referred to as IL-13 R alpha 1. The high affinity IL-13 binding protein, previously also designated IL-13 R or IL-13 R alpha l, is now referred to as IL-13 R alpha 2. Human IL-13 R alpha 2 was originally cloned from the Caki-1 human renal carcinoma cell line. The IL-13 R alpha 2 cDNA encodes a 380 amino acid (aa) residue precursor protein with a putative 26 aa residue signal peptide, a 317 residue extracellular domain, a 20 aa residue transmembrane region and a 17 aa residue cytoplasmic tail. Human and mouse IL‑13 R alpha 2 share 59% aa sequence identity. The extracellular domain of IL-13 R alpha 2 is also closely related to that of IL-13 R alpha 1. However, the 17 aa residue cytoplasmic domain of IL-13 R alpha 2 is much shorter than that of IL-13 R alpha 1, suggesting that the two receptors are functionally distinct. IL-13 R alpha 1 has been shown to combine with the IL-4 R to form a high-affinity receptor complex capable of transducing an IL‑13‑dependent proliferative signal. The role of IL-13 R alpha 2 in IL-13 signaling remains to be elucidated. The amino-terminal 27 aa residues of the human and mouse IL‑13 R alpha 2 are nearly identical to that of a soluble mouse IL-13 binding protein purified from mouse serum and urine.
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Donaldson, D.D. et al. (1998) J. Immunol. 161:2317.
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Hilton, D.J. et al. (1996) Proc. Natl. Acad. Sci. USA 93:497.
Zhang, J.G. et al. (1997) J. Biol. Chem. 272:9474.
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.