Recombinant Human IL-7 Protein


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Product Details

Reactivity HuSpecies Glossary
Applications Bioactivity

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Recombinant Human IL-7 Protein Summary

Details of Functionality
Measured in a cell proliferation assay using PHA-activated human peripheral blood lymphocytes (PBL). Yokota, T. et al. (1986) Proc. Natl. Acad. Sci. USA 83:5894. The ED50 for this effect is 0.1-0.5 ng/mL.
The specific activity of Recombinant Human IL-7 is approximately 4.4 x 105 IU/μg, which is calibrated against human IL-7 WHO International Standard (NIBSC code: 90/530).
E. coli-derived human IL-7 protein
Asp26-His177, with an N-terminal Met
Accession #
N-terminal Sequence
Protein/Peptide Type
Recombinant Proteins
>97%, by SDS-PAGE under reducing conditions and visualized by silver stain.
Endotoxin Note
<0.01 EU per 1 μg of the protein by the LAL method.


Theoretical MW
17 kDa.
Disclaimer note: The observed molecular weight of the protein may vary from the listed predicted molecular weight due to post translational modifications, post translation cleavages, relative charges, and other experimental factors.
Read Publications using
207-IL in the following applications:

Packaging, Storage & Formulations

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.
  • 3 months, -20 to -70 °C under sterile conditions after reconstitution.
Lyophilized from a 0.2 μm filtered solution in PBS with BSA as a carrier protein. *1 mg pack size (01M) is supplied as a 0.2 µm filtered solution in PBS with BSA as a carrier protein.
>97%, by SDS-PAGE under reducing conditions and visualized by silver stain.
Reconstitution Instructions
Reconstitute at 50 μg/mL in sterile PBS containing at least 0.1% human or bovine serum albumin.


This product is produced by and ships from R&D Systems, Inc., a Bio-Techne brand.

Alternate Names for Recombinant Human IL-7 Protein

  • IL7
  • IL-7
  • IL-7interleukin-7
  • interleukin 7
  • Lymphopoietin-1
  • PBGF


IL-7 (interleukin-7) is a 25 kDa cytokine of the hemopoietin family that plays important roles in lymphocyte differentiation, proliferation, and survival (1‑4). Human IL‑7 cDNA encodes 177 amino acids (aa) that include a 25 aa signal peptide (3). Human IL-7 shares approximately 60-63% aa sequence identity with mouse, rat, canine and feline IL-7, and 72-76% with equine, bovine, ovine, porcine, feline and canine IL-7. Human and mouse IL-7 exhibit cross-species activity (2, 3). IL-7 protein is produced by a wide variety of cells in primary and secondary lymphoid tissues, including stromal epithelial cells of the thymus, bone marrow, and intestines (1, 2, 5). Circulating IL-7 protein is limiting in healthy animals, but increases during lymphopenia (1, 6). IL-7 signals through a complex of the IL-7 Receptor alpha subunit (IL-7 R alpha, also known as CD127) with the common gamma chain ( gamma c) (1). The gamma c is also a subunit of the receptors for IL-2, -4, -9, -15, and -21 (1). IL-7 R alpha is expressed on double negative (CD4-CD8-) and CD4+ or CD8+ single positive naïve and memory T cells, but undergoes IL-7-mediated down‑regulation and shedding during antigen-driven T cell proliferation, and is absent on regulatory T cells (1, 2, 6-11). IL-7 contributes to the maintenance of all naïve and memory T cells, mainly by promoting expression of the anti-apoptotic protein Bcl-2 (9-11). It is required for optimal T cell-dendritic cell interaction (6). IL-7 is expressed early in B cell development prior to the appearance of surface IgM (1, 5, 9). In mouse, IL-7 activation of IL-7 R alpha is critical for both T cell and B cell lineage development, while in humans, it is required for T cell but not for B cell development (4, 9, 12, 13). However, IL-7 functions in both mouse and human pro-B cells to suppress premature Ig light chain recombination during proliferative growth (14, 15).

  1. Sasson, S.C. et al. (2006) Curr. Drug Targets 7:1571.
  2. Barata, J.T. et al. (2006) Exp. Hematol. 34:1133.
  3. Goodwin, R.G. et al. (1990) Proc. Natl. Acad. Sci. USA 86:302.
  4. Namen, A.E. et al. (1988) Nature 333:571.
  5. Shalapour, S. et al. (2012) PLoS ONE 7: e31939.
  6. Saini, M. et al. (2009) Blood 113:5793.
  7. Park, J.H. et al. (2004) Immunity 21:289.
  8. Vranjkovic, A. et al. (2007) Int. Immunol. 19:1329.
  9. Sudo, T. et al. (1993) Proc. Natl. Acad. Sci. 90:9125.
  10. Seddon, B. et al. (2003) Nat. Immunol. 4:680.
  11. Schluns, K.S. et al. (2000) Nat. Immunol. 5:426.
  12. Peschon, J.J. et al. (1994) J. Exp. Med. 180:1955.
  13. Pribyl, J.A. and T.W. LeBien (1996) Proc. Natl. Acad. Sci. 93:10348.
  14. Johnson, K. et al. (2012) J. Immunol. 188:6084.
  15. Nodland, S.E. et al. (2011) Blood 118:2116.

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Publications for IL-7 (207-IL)(128)

We have publications tested in 6 confirmed species: Human, Mouse, N/A, Primate - Macaca fascicularis (Crab-eating Monkey or Cynomolgus Macaque), Primate - Macaca mulatta (Rhesus Macaque), Primate - Papio cynocephalus (Yellow Baboon).

We have publications tested in 6 applications: Bioassay, CAR-T (Bioassay), CAR-T (Differentiation), Cell Culture, ELISA (Standard), In Vivo.

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CAR-T (Differentiation)
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Filter By Species
Primate - Macaca fascicularis (Crab-eating Monkey or Cynomolgus Macaque)
Primate - Macaca mulatta (Rhesus Macaque)
Primate - Papio cynocephalus (Yellow Baboon)
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Showing Publications 1 - 10 of 128. Show All 128 Publications.
Publications using 207-IL Applications Species
CR Maldini, K Gayout, RS Leibman, DL Dopkin, JP Mills, X Shan, JA Glover, JL Riley HIV-Resistant and HIV-Specific CAR-Modified CD4+ T Cells Mitigate HIV Disease Progression and Confer CD4+ T Cell Help In�Vivo Mol. Ther., 2020;0(0):. 2020 [PMID: 32454027] (CAR-T (Differentiation), Human) CAR-T (Differentiation) Human
F Hsiao, J Frouard, A Gramatica, G Xie, S Telwatte, GQ Lee, P Roychoudhu, R Schwarzer, X Luo, SA Yukl, S Lee, R Hoh, SG Deeks, RB Jones, M Cavrois, WC Greene, NR Roan Tissue memory CD4+ T cells expressing IL-7 receptor-alpha (CD127) preferentially support latent HIV-1 infection PLoS Pathog., 2020;16(4):e1008450. 2020 [PMID: 32353080] (Cell Culture, Human) Cell Culture Human
N Borthwick, S Silva-Arri, A Llano, M Takiguchi, C Brander, T Hanke Novel Nested Peptide Epitopes Recognized by CD4+ T Cells Induced by HIV-1 Conserved-Region Vaccines Vaccines (Basel), 2020;8(1):. 2020 [PMID: 31963212] (Bioassay, Human) Bioassay Human
NL Truex, RL Holden, BY Wang, PG Chen, S Hanna, Z Hu, K Shetty, O Olive, D Neuberg, N Hacohen, DB Keskin, PA Ott, CJ Wu, BL Pentelute Automated Flow Synthesis of Tumor Neoantigen Peptides for Personalized Immunotherapy Sci Rep, 2020;10(1):723. 2020 [PMID: 31959774] (Cell Culture, Human) Cell Culture Human
C Seillet, K Luong, J Tellier, N Jacquelot, RD Shen, P Hickey, VC Wimmer, L Whitehead, K Rogers, GK Smyth, AL Garnham, ME Ritchie, GT Belz The neuropeptide VIP confers anticipatory mucosal immunity by regulating ILC3 activity Nat. Immunol., 2019;0(0):. 2019 [PMID: 31873294] (Cell Culture, Mouse) Cell Culture Mouse
DN Nguyen, TL Roth, PJ Li, PA Chen, R Apathy, MR Mamedov, LT Vo, VR Tobin, D Goodman, E Shifrut, JA Bluestone, JM Puck, FC Szoka, A Marson Polymer-stabilized Cas9 nanoparticles and modified repair templates increase genome editing efficiency Nat. Biotechnol., 2019;0(0):. 2019 [PMID: 31819258] (Cell Culture, Human) Cell Culture Human
A Guvenel, A Jozwik, S Ascough, SK Ung, S Paterson, M Kalyan, Z Gardener, E Bergstrom, S Kar, MS Habibi, A Paras, J Zhu, M Park, J Dhariwal, M Almond, EH Wong, A Sykes, J Del Rosari, MB Trujillo-T, P Mallia, J Sidney, B Peters, OM Kon, A Sette, SL Johnston, PJ Openshaw, C Chiu Epitope-specific airway-resident CD4+ T cell dynamics during experimental human RSV infection J. Clin. Invest., 2019;0(0):. 2019 [PMID: 31815739] (Cell Culture, Human) Cell Culture Human
JD Ventura, J Beloor, E Allen, T Zhang, KA Haugh, PD Uchil, C Ochsenbaue, C Kieffer, P Kumar, TJ Hope, W Mothes Longitudinal bioluminescent imaging of HIV-1 infection during antiretroviral therapy and treatment interruption in humanized mice PLoS Pathog., 2019;15(12):e1008161. 2019 [PMID: 31805155] (Cell Culture, Human) Cell Culture Human
ZY Li, JJ Zhou, CL Luo, LM Zhang Activation of TGR5 alleviates inflammation in rheumatoid arthritis peripheral blood mononuclear cells and in mice with collagen II?induced arthritis Mol Med Rep, 2019;20(5):4540-4550. 2019 [PMID: 31702035] (Cell Culture, Human) Cell Culture Human
ER Wonderlich, K Subramania, B Cox, A Wiegand, C Lackman-Sm, MJ Bale, M Stone, R Hoh, MF Kearney, F Maldarelli, SG Deeks, MP Busch, RG Ptak, DA Kulpa Effector memory differentiation increases detection of replication-competent HIV-l in resting CD4+ T cells from virally suppressed individuals PLoS Pathog., 2019;15(10):e1008074. 2019 [PMID: 31609991] (Bioassay, Human) Bioassay Human
Show All 128 Publications.

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Gene Symbol IL7