• Species Reactivity

  Human

• Specificity

  Detects human IL-7 R alpha in Western blots. In Western blots, approximately 5% cross-reactivity was observed with recombinant human    
  (rh) IL‑10 R, rhIL‑2 R beta, rhIL‑5 R alpha, and rhIL‑6 R.

• Source

  Monoclonal Mouse IgG    ₁ Clone # 40131

• Purification

  Protein A or G purified from ascites

• Immunogen

  Mouse myeloma cell line NS0-derived recombinant human IL-7 R alpha    
  Extracellular domain

• Formulation

  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.

• Label

  Unconjugated

Applications

• 
  

  Recommended    
  Concentration

  Sample

• Western Blot

  1 µg/mL

  Recombinant Human IL‑7 R alpha /CD127 Fc Chimera (Catalog # )

• 
  

• Flow Cytometry

  2.5 µg/10    ⁶ cells

  See below

• 
  

• CyTOF-ready

  Ready to be labeled using established conjugation methods. No BSA or other carrier proteins that could interfere with conjugation.

• 
  

Please Note: Optimal dilutions should be determined by each laboratory for each application.  are available in the Technical Information section on our website.

Data Examples

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-7 R alpha/CD127

Interleukin 7 Receptor alpha (IL-7 R alpha ), also known as CD127, is a 75 kDa hematopoietin receptor superfamily member that plays an important role in lymphocyte differentiation, proliferation, and survival (1, 2). Mature human IL-7 R alpha consists of a 219 amino acid (aa) extracellular domain (ECD) with one fibronectin type-III domain and a WSXWS motif, a 25 aa transmembrane segment, and a 195 aa cytoplasmic domain (3). Alternate splicing of human IL-7 R alpha generates a secreted soluble form of the receptor (3). Within the ECD, human IL‑7 R alpha shares 67% aa sequence identity with mouse and rat IL-7 R alpha. IL-7 R alpha associates with the common gamma chain ( gamma _c) to form the functional high affinity IL-7 receptor complex (4). The gamma _c is also a subunit of the receptors for IL-2, -4, -9, -15, and -21. Human and mouse IL‑7 show cross-species activity through the IL-7 receptor (3, 5). IL-7 R alpha is expressed on double negative (CD4^-/CD8^-) and CD4⁺ or CD8⁺ single positive T cells as well as on CD8⁺ memory T cells and their precursors (6, 7). It is expressed early in B cell development, prior to the appearance of surface IgM (6). In mouse, IL-7 activation of IL-7 R alpha is critical for both T cell and B cell lineage development (8). In human, by contrast, it is required for T cell but not for B cell development (9). IL-7 induces the downregulation and shedding of cell surface IL‑7 R alpha (10). IL-7 R alpha additionally associates with TSLP R to form the functional receptor for thymic stromal lymphopoietin (11, 12). TSLP indirectly regulates T cell development by modulating dendritic cell activation (2, 13). Knockout of TSLP R in mice provokes minor changes in B and T cell development compared to those seen with IL-7 R alpha deletion (8, 14). The complexity of IL-7 R alpha biology is suggested by the competition between IL-7 and TSLP for receptor binding and by the ability of IL-7 R alpha to form functional complexes with SCF R and HGF R (11, 12, 15, 16).

• References:

1. Mazzucchelli, R. and S.K. Durum (2007) Nat. Rev. Immunol. 7:144.

2. Liu, Y-J. et al. (2007) Annu. Rev. Immunol. 25:193.

3. Goodwin, R.G. et al. (1990) Cell 60:941.

4. Noguchi, M. et al. (1993) Science 262:1877.

5. Barata, J.T. et al. (2006) Exp. Hematol. 34:1133.

6. Sudo, T. et al. (1993) Proc. Natl. Acad. Sci. USA 90:9125.

7. Kaech, S.M. et al. (2003) Nat. Immunol. 4:1191.

8. Peschon, J.J. et al. (1994) J. Exp. Med. 180:1955.

9. Prieyl, J.A. and T.W. LeBien (1996) Proc. Natl. Acad. Sci. USA 93:10348.

10. Vranjkovic, A. et al. (2007) Int. Immunol. 19:1329.

11. , L.S. et al. (2000) J. Exp. Med. 192:659.

12. Pandey, A. et al. (2000) Nat. Immunol. 1:59.

13. Reche, P.A. et al. (2001) J. Immunol. 167:336.

14. Al-Shami, A. et al. (2004) J. Exp. Med. 200:159.

15. Jahn, T. et al. (2007) Blood 110:1840.

16. Lai, L. et al. (2006) Blood 107:1776.

• Long Name:

  Interleukin 7 Receptor alpha

• Entrez Gene IDs:

  3575 (Human); 16197 (Mouse); 294797 (Rat)

• Alternate Names:

  CD127 antigen; CD127; CD127ILRA; CDW127; IL-7 R alpha; IL-7 receptor subunit alpha; IL7R alpha; IL-7R subunit alpha; IL7R; IL7RA; IL-7Ra; IL-7R-alpha; interleukin 7 receptor alpha chain; interleukin 7 receptor isoform H5-6; interleukin 7 receptor; interleukin-7 receptor subunit alpha