Recombinant Human IL-3 Protein, CF


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.
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.

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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.
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)(190)

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 190. Show All 190 Publications.
Publications using 203-IL/CF Applications Species
L Feige, T Kozaki, G Dias de Me, V Guillemot, F Larrous, F Ginhoux, H Bourhy Susceptibilities of CNS Cells towards Rabies Virus Infection Is Linked to Cellular Innate Immune Responses Viruses, 2022;15(1):. 2022 [PMID: 36680128] (Bioassay, Human) Bioassay Human
X Wang, S Cooper, HE Broxmeyer, R Kapur Transient regulation of RNA methylation in human hematopoietic stem cells promotes their homing and engraftment Leukemia, 2022;0(0):. 2022 [PMID: 36460765] (Cell Culture, Human) Cell Culture Human
PY Su, W Lee, J Zernant, SH Tsang, T Nagasaki, B Corneo, R Allikmets Establishment of the iPSC line CUIMCi005-A from a patient with Stargardt disease for retinal organoid culture Oncogene, 2022;65(0):102973. 2022 [PMID: 36455383] (Bioassay, Human) Bioassay Human
X Liu, N Sato, T Yabushita, J Li, Y Jia, M Tamura, S Asada, T Fujino, T Fukushima, T Yonezawa, Y Tanaka, T Fukuyama, A Tsuchiya, S Shikata, H Iwamura, C Kinouchi, K Komatsu, S Yamasaki, T Shibata, AT Sasaki, J Schibler, M Wunderlich, E O'Brien, B Mizukawa, JC Mulloy, Y Sugiura, H Takizawa, T Shibata, K Miyake, T Kitamura, S Goyama IMPDH inhibition activates TLR-VCAM1 pathway and suppresses the development of MLL-fusion leukemia Embo Molecular Medicine, 2022;0(0):e15631. 2022 [PMID: 36453131] (Cell Culture, Human) Cell Culture Human
Kunitomi A, Hirohata R, Arreola V, Osawa M, Kato T, Nomura M, Kawaguchi J, Hara H, Kusano K, Takashima Y, Takahashi K, Fukuda K, Takasu N, Yamanaka S Improved Sendai viral system for reprogramming to naive pluripotency. Cell Rep Methods, 0;2(11):100317. 0 [PMID: 36447645] (Bioassay, Human) Bioassay Human
N Vilaplana-, V Cuminetti, R Almaghrabi, G Papatzikas, AK Rout, M Jeeves, E González, Y Alyahyawi, A Cunningham, A Erdem, F Schnütgen, M Raghavan, S Potluri, JB Cazier, JJ Schuringa, MAC Reed, L Arranz, UL Günther, P Garcia Crosstalk between AML and stromal cells triggers acetate secretion through the metabolic rewiring of stromal cells Elife, 2022;11(0):. 2022 [PMID: 36052997] (Bioassay, Human) Bioassay Human
YS Michaels, JM Edgar, MC Major, EL Castle, C Zimmerman, T Yin, A Hagner, C Lau, HH Hsu, MI Ibañez-Rio, LJ Durland, DJHF Knapp, PW Zandstra DLL4 and VCAM1 enhance the emergence of T cell-competent hematopoietic progenitors from human pluripotent stem cells Science Advances, 2022;8(34):eabn5522. 2022 [PMID: 36001668] (Bioassay, Human) Bioassay Human
BF Vahsen, E Gray, A Candalija, KML Cramb, J Scaber, R Dafinca, A Katsikoudi, Y Xu, L Farrimond, R Wade-Marti, WS James, MR Turner, SA Cowley, K Talbot Human iPSC co-culture model to investigate the interaction between microglia and motor neurons Scientific Reports, 2022;12(1):12606. 2022 [PMID: 35871163] (Bioassay, Human) Bioassay Human
IB Kim, T Lee, J Lee, J Kim, S Lee, IG Koh, JH Kim, JY An, H Lee, WK Kim, YS Ju, Y Cho, SJ Yu, SA Kim, M Oh, DW Han, E Kim, JK Choi, HJ Yoo, JH Lee Non-coding de novo mutations in chromatin interactions are implicated in autism spectrum disorder Oncogene, 2022;0(0):. 2022 [PMID: 35840799] (Bioassay, Human) Bioassay Human
S Wahlen, F Matthijsse, W Van Loocke, S Taveirne, L Kiekens, E Persyn, E Van Ammel, Z De Vos, S De Munter, P Matthys, F Van Nieuwe, T Taghon, B Vandekerck, P Van Vlierb, G Leclercq The transcription factor RUNX2 drives the generation of human NK cells and promotes tissue residency Elife, 2022;11(0):. 2022 [PMID: 35793229] (Bioassay, Human) Bioassay Human
Show All 190 Publications.

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Gene Symbol IL3