Recombinant IL-3 Protein


Flow Cytometry: IL3 Protein [NBP1-42925] - Proliferation of the TF-1 cell line in response to Human IL-3 Recombinant Protein Carrier-Free

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Recombinant IL-3 Protein Summary

A partial protein corresponding to IL3.
E. coli expressed mature human IL-3 (accession #NM_000588).
Details of Functionality
This recombinant human IL-3 has been tested by bioassays using the TF-1 cell line. The ED50 measured in a TF-1 proliferation assay is typically less than 0.15 ng/ml, corresponding to a specific activity of greater than 7x10^6 Units/mg.
Protein/Peptide Type
Partial Recombinant Protein
Endotoxin Note
Less than 0.01 ng/ug cytokine as determined by the LAL assay.

Reactivity Notes

This protein was made to the human sequence.

Packaging, Storage & Formulations

Store at -80C. Avoid freeze-thaw cycles.
20mM Phosphate Buffer, 0.15M NaCl, pH 7.0, 0.22 um filtered.
0.09% Sodium Azide


Purity: Greater than 95%, as determined by SDS-PAGE

Alternate Names for Recombinant IL-3 Protein

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


Interleukin 3 (IL-3), also called Mast Cell Growth Factor (MCGF), Multi-Colony Stimulating Factor (multi-CSF), Eosinophil-CSF (E-CSF), is produced by activated T cells, mast cells and eosinophils. IL-3 is a hematopoietic growth factor that stimulates colony formation of erythroid, megakaryocyte, neutrophil, eosinophil, basophil, mast cell and monocytic lineages. Most of these functions are enhanced or dependent on co-stimulation with other cytokines. Human and mouse IL-3 share only 29% sequence identity at the amino acid level. The bioactivity of IL-3 is highly species specific. Human IL-3 has no activity on mouse cells.


This product is for research use only and is not approved for use in humans or in clinical diagnosis. Peptides and proteins are guaranteed for 3 months from date of receipt.

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Gene Symbol IL3