Human IL-5 R alpha /CD125 Antibody

Catalog # Availability Size / Price Qty
MAB2531-100
MAB2531-SP
Detection of IL-5 R alpha/CD125 in HEK293 Human Cell Line Transfected with Human IL-5 R alpha/CD125 and eGFP by Flow Cytometry
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Human IL-5 R alpha /CD125 Antibody Summary

Species Reactivity
Human
Specificity
Detects human IL‑5 R alpha /CD125 in direct ELISAs.
Source
Monoclonal Mouse IgG1 Clone # 1036601
Purification
Protein A or G purified from hybridoma culture supernatant
Immunogen
S. frugiperda insect ovarian cell line Sf 21-derived recombinant human IL‑5 R alpha /CD125
Asp21-Arg335
Accession # O08665
Formulation
Lyophilized from a 0.2 μm filtered solution in PBS with Trehalose. *Small pack size (SP) is supplied either lyophilized or as a 0.2 µm filtered solution in PBS.
Label
Unconjugated

Applications

Recommended Concentration
Sample
Flow Cytometry
0.25 µg/106 cells
HEK293 Human Cell Line Transfected with Human IL-5 R alpha/CD125 and eGFP

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

Flow Cytometry View Larger

Detection of IL-5 R alpha/CD125 in HEK293 Human Cell Line Transfected with Human IL-5 R alpha/CD125 and eGFP by Flow Cytometry HEK293 human embryonic kidney cell line transfected with (A) human IL-5 R alpha/CD125 or (B) irrelevant protein, and eGFP was stained with Mouse Anti-Human IL-5 R alpha/CD125 Monoclonal Antibody (Catalog # MAB2531) followed by Allophycocyanin-conjugated Anti-Mouse IgG Secondary Antibody (F0101B). Quadrant markers were set based on control antibody staining (MAB002). Staining was performed using our Staining Membrane-associated Proteins protocol.

Neutralization View Larger

Cell Proliferation Induced by IL‑5 and Neutralization by Human IL‑5 R alpha /CD125 Antibody. Recombinant Human IL-5 (205-IL) stimulates proliferation in the TF-1 human erythroleukemic cell line in a dose-dependent manner (orange line). Proliferation elicited by Recombinant Human IL-5 (0.5 ng/mL) is neutralized (green line) by increasing concentrations of Mouse Anti-Human IL-5 Ra/CD125 Monoclonal Antibody (MAB2531). The ND50 is typically 0.05-0.5 µg/mL.

Reconstitution Calculator

Reconstitution Calculator

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Preparation and Storage

Reconstitution
Reconstitute at 0.5 mg/mL in sterile PBS.
Shipping
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-5 R alpha/CD125

Interleukin 5, produced primarily by activated T cells and mast cells, has diverse biological effects on a variety of cell types. Human IL-5 is a potent eosinophil differentiation and activation factor in vivo and in vitro. Additionally, it has also been reported that IL-5 can stimulate the proliferation and/or differentiation of basophils and B cells. The multiple effects of IL-5 are mediated by binding of the cytokine to specific cell surface receptors expressed on target cells. As is the case with many other cytokines, the functional high-affinity receptor for IL-5 is a complex consisting of a ligand binding subunit ( alpha chain) and a second subunit ( beta chain) that can modulate the ligand binding affinity of the receptor complex. In the case of IL-5, the beta subunit is shared with the high affinity receptor complexes for IL-3 and GM-CSF. The beta  chain does not bind any of the cytokines in question but is indispensable for the cytokine-mediated signaling. cDNA clones for the alpha  chain (IL-5 R alpha ) of both the mouse and human high affinity IL-5 receptor complexes have been isolated. Human and mouse IL-5 R alpha are both members of the hematopoietin receptor superfamily characterized by the presence of the WSXWS, and a four cysteine residue motif in the extracellular domain of the transmembrane protein. In addition to the cDNA clone encoding the full-length transmembrane protein, cDNA clones that arise from alternative splicing and that encode soluble secreted forms of IL-5 R alpha have been isolated from mouse as well as human cells. A naturally-occurring soluble form of the IL-5 R alpha has been detected in biological fluids of autoimmune-prone mice and mice bearing chronic B cell leukemia (BCL1). A recombinant human IL-5 soluble receptor  alpha has been shown to bind the human IL-5 dimer in a 1:1 ratio and acts as a human ­IL-5 antagonist. This molecule inhibits the proliferation of IL-5-dependent cell lines and blocks human umbilical cord blood eosinophil differentiation.

Long Name
Interleukin 5 Receptor alpha
Entrez Gene IDs
3568 (Human); 16192 (Mouse)
Alternate Names
CD125 antigen; CD125; CDw125CD125; HSIL5R3; IL-5 R alpha; IL-5 receptor subunit alpha; IL5R alpha; IL-5R subunit alpha; IL5R; IL5RA; IL-5Ra; IL-5R-alpha; interleukin 5 receptor type 3; interleukin 5 receptor, alpha; interleukin-5 receptor alpha chain; interleukin-5 receptor alpha subunit; interleukin-5 receptor subunit alpha; MGC26560

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