Recombinant Human IL-3 Protein, CF


1 μg/lane of Recombinant Human IL-3 was resolved with SDS-PAGE under reducing (R) conditions and visualized by silver staining, showing a single band at 14 kDa.
Recombinant Human IL-3 (Catalog #203‑IL/CF) stimulates cell proliferation of the TF-1 human erythroleukemic cell line. The ED50 for this effect is 0.02‑0.1 ng/mL.

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Reactivity HuSpecies Glossary
Applications Bioactivity

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Recombinant Human IL-3 Protein, CF Summary

Additional Information
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Details of Functionality
Measured in a cell proliferation assay using TF‑1 human erythroleukemic cells. Kitamura, T. et al. (1989) J. Cell Physiol. 140:323. The ED50 for this effect is 0.02-0.1 ng/mL.
The specific activity of Recombinant Human IL-3 is approximately 1.8 x 103 IU/μg, which is calibrated against recombinant human IL-3 WHO International Standard (NIBSC code: 91/510).   Specific activity is for reference purposes only and is not routinely tested.  
E. coli-derived human IL-3 protein
Ala20-Phe152, with and without an N-terminal Met
Accession #
N-terminal Sequence
Ala20 and Met
Protein/Peptide Type
Recombinant Proteins
>97%, by SDS-PAGE under reducing conditions and visualized by silver stain.
Endotoxin Note
<0.10 EU per 1 μg of the protein by the LAL method.


  • Bioactivity
Theoretical MW
15 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
203-IL/CF 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.
>97%, by SDS-PAGE under reducing conditions and visualized by silver stain.
Reconstitution Instructions
Reconstitute at 100 μg/mL in sterile PBS.


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

Alternate Names for Recombinant Human IL-3 Protein, CF

  • Hematopoietic growth factor
  • IL3
  • IL-3
  • IL-3MGC79398
  • interleukin 3 (colony-stimulating factor, multiple)
  • interleukin-3
  • Mast cell growth factor
  • mast-cell growth factor
  • MCGF
  • MCGFMGC79399
  • multilineage-colony-stimulating factor
  • Multipotential colony-stimulating factor
  • P-cell stimulating factor
  • P-cell-stimulating factor


Interleukin 3 is a pleiotropic factor produced primarily by activated T cells that can stimulate the proliferation and differentiation of pluripotent hematopoietic stem cells as well as various lineage committed progenitors. In addition, IL-3 also affects the functional activity of mature mast cells, basophils, eosinophils and macrophages. Because of its multiple functions and targets, it was originally studied under different names, including mast cell growth factor, P-cell stimulating factor, burst promoting activity, multi-colony stimulating factor, thy-1 inducing factor and WEHI-3 growth factor. In addition to activated T cells, other cell types such as human thymic epithelial cells, activated murine mast cells, murine keratinocytes and neurons/astrocytes can also produce IL-3. At the amino acid sequence level, mature human and murine IL-3 share only 29% sequence identity. Consistent with this lack of homology, IL-3 activity is highly species-specific and human IL-3 does not show activity on murine cells.

IL-3 exerts its biological activities through binding to specific cell surface receptors. The high affinity receptor responsible for IL-3 signaling is composed of at least two subunits, an IL-3 specific alpha chain which binds IL-3 with low affinity and a common beta chain that is shared by the IL-5 and GM-CSF high-affinity receptors. Although the beta chain itself does not bind IL-3, it confers high-affinity IL-3 binding in the presence of the  alpha chain. Receptors for IL-3 are present on bone marrow progenitors, macrophages, mast cells, eosinophils, megakaryocytes, basophils and various myeloid leukemic cells.

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Publications for IL-3 (203-IL/CF)(167)

We have publications tested in 6 confirmed species: Human, Mouse, Porcine, Primate - Macaca fascicularis (Crab-eating Monkey or Cynomolgus Macaque), Primate - Macaca mulatta (Rhesus Macaque), Xenograft.

We have publications tested in 4 applications: Bioassay, Cell Culture, Differentiation, In Vivo.

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Primate - Macaca fascicularis (Crab-eating Monkey or Cynomolgus Macaque)
Primate - Macaca mulatta (Rhesus Macaque)
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Showing Publications 1 - 10 of 167. Show All 167 Publications.
Publications using 203-IL/CF Applications Species
Y Dong, X Li, W Fu, X Tian, G Guo, Y Peng, Y Zhai, J Zhao, Z Ding, X Zhao, J Dong Generation of an iPSC line (ZZUNEUi021-A) from a hypertrophic cardiomyopathy patient with TNNT2 mutation Stem Cell Research, 2021;58(0):102622. 2021 [PMID: 34929444] (Bioassay, Human) Bioassay Human
AF de Souza, FF Bressan, NCG Pieri, RC Botigelli, T Revay, SK Haddad, DT Covas, ES Ramos, WA King, FV Meirelles Generation of Primordial Germ Cell-like Cells from iPSCs Derived from Turner Syndrome Patients Cells, 2021;10(11):. 2021 [PMID: 34831322]
C Tipgomut, A Khuhapinan, MC Wilson, S Poldee, KJ Heesom, C Metheetrai, O Sripichai, C Mitrpant, J Frayne, K Trakarnsan MTAP-related increased erythroblast proliferation as a mechanism of polycythaemia vera Scientific Reports, 2021;11(1):22483. 2021 [PMID: 34795367] (Bioassay, Human) Bioassay Human
GB Schwartz, H Kubo, MM Laronda Generation of two human induced pluripotent stem cell lines from a patient with complete androgen insensitivity syndrome with a hemizygous single nucleotide variant in the androgen receptor (AR) gene Stem Cell Research, 2021;55(0):102441. 2021 [PMID: 34233262] (Bioassay, Human) Bioassay Human
G Iannello, A Patel, D Sirabella, B Corneo, V Thaker Generation of the iPSC line CUIMCi003-A derived from a patient with severe early onset obesity Stem Cell Research, 2021;54(0):102432. 2021 [PMID: 34214899] (Bioassay, Human) Bioassay Human
S Simón Serr, M Tavecchio, A Grönberg, W Sime, M Jemaà, S Moss, MA Gregory, P Gallay, E Elmér, MJ Hansson, R Massoumi Novel Cyclophilin Inhibitor Decreases Cell Proliferation and Tumor Growth in Models of Hepatocellular Carcinoma Cancers, 2021;13(12):. 2021 [PMID: 34207224] (Bioassay, Human) Bioassay Human
GA Newby, JS Yen, KJ Woodard, T Mayuranath, CR Lazzarotto, Y Li, H Sheppard-T, SN Porter, Y Yao, K Mayberry, KA Everette, Y Jang, CJ Podracky, E Thaman, C Lechauve, A Sharma, JM Henderson, MF Richter, KT Zhao, SM Miller, T Wang, LW Koblan, AP McCaffrey, JF Tisdale, TA Kalfa, SM Pruett-Mil, SQ Tsai, MJ Weiss, DR Liu Base editing of haematopoietic stem cells rescues sickle cell disease in mice Nature, 2021;0(0):. 2021 [PMID: 34079130] (Bioassay, Human) Bioassay Human
J Borsoi, M Morato-Mar, F de Araújo, L Assis Pere, LE Farinha-Ar, R Delgado Sa, AB Alvarez Pe, L Veiga Pere Generation of two human induced pluripotent stem cell (hiPSC) lines derived from unrelated Marfan Syndrome patients Stem Cell Research, 2021;54(0):102407. 2021 [PMID: 34062330] (Bioassay, Human) Bioassay Human
S Matsuo, Y Nishinaka-, Y Kazuki, M Oshimura, T Nakahata, A Niwa, MK Saito Pluripotent stem cell model of early hematopoiesis in Down syndrome reveals quantitative effects of short-form GATA1 protein on lineage specification PLoS ONE, 2021;16(3):e0247595. 2021 [PMID: 33780474] (Bioassay, Human) Bioassay Human
S Jung, E Appleton, M Ali, GM Church, A Del Sol A computer-guided design tool to increase the efficiency of cellular conversions Nature Communications, 2021;12(1):1659. 2021 [PMID: 33712564] (Bioassay, Human) Bioassay Human
Show All 167 Publications.

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Gene Symbol IL3