Human IL-3R alpha/CD123 Alexa Fluor® 594-conjugated Antibody

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FAB301T-100UG
R&D Systems Antibodies
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Human IL-3R alpha/CD123 Alexa Fluor® 594-conjugated Antibody Summary

Species Reactivity
Human
Specificity
Detects human IL‑3 R alpha /CD123 in direct ELISAs and Western blots.
Source
Monoclonal Mouse IgG1 Clone # 32703
Immunogen
S. frugiperda insect ovarian cell line Sf 21-derived recombinant human IL‑3 R alpha /CD123
Lys20-Arg305, predicted
Accession # P26951
Formulation
Supplied 0.2 mg/mL in a saline solution containing BSA and Sodium Azide.
Label
Alexa Fluor 594 (Excitation= 590 nm, Emission= 617 nm)

Applications

Recommended Concentration
Sample
Flow Cytometry
0.25-1 µg/106 cells
THP‑1 human acute monocytic leukemia cell line

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.

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Preparation and Storage

Shipping
The product is shipped with polar packs. Upon receipt, store it immediately at the temperature recommended below.
Stability & Storage
Store the unopened product at 2 - 8 °C. Do not use past expiration date.

Background: IL-3R alpha

IL-3 is a pleiotropic cytokine that can stimulate proliferation and differentiation of pluripotent hematopoietic stem cells as well as various lineage committed progenitors (1, 2). IL-3 exerts its activity through binding to a specific cell surface receptor known as IL-3 R. IL-3 R is a heterodimeric structure composed of a 70 kDa IL-3 R alpha subunit (CD123) and a 120-140 kDa IL-3 R beta subunit (CD131) (3, 4). IL-3 R alpha binds IL-3 with relatively low affinity. In the presence of IL-3 R beta, however, IL-3 R alpha has a much higher affinity for IL-3. It is not clear how signal transduction occurs following IL-3 binding. The IL-3 R alpha chain has a very short intracellular domain while the IL‑3 R beta chain has a very large cytoplasmic domain. The IL‑3 R beta chain is also shared by the receptors for IL-5 and GM-CSF. Cells known to express IL-3 receptors include hematopoietic progenitors, epithelial cells, double negative T cells, mast cells, basophils and blood monocytes (5).

References
  1. Moore, M.A.S. et al. (1991) Blood 72:944.
  2. Warren, D.J. et al. (1988) J. Immunol. 140:94.
  3. Plant M. et al. (1989) Nature 339:150.
  4. Budel, L.M. et al. (1990) Blood 75:1439.
  5. Schrader, J.W. et al. (1988) In Interleukin-3: The Panspecific hemopoietin (ed. J.W. Schrader), Academic Press, San Diego, CA.
Long Name
Interleukin 3 Receptor alpha
Entrez Gene IDs
3563 (Human); 16188 (Mouse); 102138639 (Cynomolgus Monkey)
Alternate Names
CD123 antigen; CD123; hIL3Ra; hIL-3Ra; IL-3 R alpha; IL-3 receptor subunit alpha; IL3R alpha; IL-3R alpha; IL-3R subunit alpha; IL3R; IL3RA; IL-3Ra; IL-3R-alpha; IL3RAY; IL3RX; IL3RY; interleukin 3 receptor, alpha (low affinity); interleukin-3 receptor subunit alpha; MGC34174

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