Recombinant Human SCF Protein


1 μg/lane of Recombinant Human SCF/c-kit Ligand was resolved with SDS-PAGE under reducing (R) conditions and visualized by silver staining, showing a single band at 19 kDa.
Recombinant Human SCF/c-kit Ligand (Catalog # 255-SC) stimulates cell proliferation of the TF-1 human erythroleukemic cell line. The ED50 for this effect is 1-5 ng/mL.

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Reactivity HuSpecies Glossary
Applications Bioactivity

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Recombinant Human SCF Protein Summary

Additional Information
A New economically priced SCF is Now Available! It has a lower endotoxin specification and is human cell expressed!
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 1‑5 ng/mL.
E. coli-derived human SCF/c-kit Ligand protein
Glu26-Ala189, with an N-terminal Met
Accession #
N-terminal Sequence
Protein/Peptide Type
Recombinant Proteins
>97%, by SDS-PAGE visualized with Silver Staining and quantitative densitometry by Coomassie® Blue Staining.
Endotoxin Note
<1.0 EU per 1 μg of the protein by the LAL method.


  • Bioactivity
Theoretical MW
19 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.
17-18 kDa, under reducing condtitions
Read Publications using
255-SC 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.
>97%, by SDS-PAGE visualized with Silver Staining and quantitative densitometry by Coomassie® Blue Staining.
Reconstitution Instructions
Reconstitute at 100-200 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 SCF Protein

  • c-kit Ligand
  • DCUA
  • DFNA69
  • DKFZp686F2250
  • familial progressive hyperpigmentation 2
  • FPH2
  • FPHH
  • KIT ligand
  • Kitl
  • KL-1
  • Mast cell growth factor
  • MGF
  • SCF
  • SCFStem cell factor
  • SFc-Kit ligand
  • SHEP7
  • SLF
  • steel factor


What is Stem cell factor?

Stem cell factor (SCF) is a potent hematopoietic growth factor required in regulating both embryonic and adult hematopoiesis. SCF protein promotes the survival, differentiation, and mobilization of multiple cell types including myeloid, erythroid, megakaryocytic, lymphoid, germ cell, and melanocyte progenitors (1 7). SCF is a primary growth and activation factor for mast cells and eosinophils (8). And SCF assists in the recovery of cardiac function following myocardial infarction by increasing the number of cardiomyocytes and vascular channels (9). Stem cell factor is an important cytokine for ex vivo clinical applications. Along with other cytokines, SCF is used in the culture and expansion of hematopoietic stem cells (HSCs) as well as for proliferation and differentiation of both myeloid and erythroid progenitor cells.

Mature stem cell factor consists of a 189 amino acid (aa) extracellular domain (ECD), a 23 aa transmembrane domain, and a 36 aa cytoplasmic tail (10). The ECD shows both N linked and O-linked glycosylation (11). SCF protein exists in two forms, a membrane-bound form and a proteolytically processed soluble form that lacks the transmembrane domain and cytoplasmic tail. The soluble form is created by proteolytic cleavage at two alternate sites in the extracellular juxtamembrane region releasing a 25 kDa soluble SCF protein which is comparable to the only form produced by Steel-dickie mutant mice (12, 13). There is also an alternately spliced isoform of human SCF that lacks 28 amino acids that encompasses the primary proteolytic recognition site (14). This form cannot be cleaved and is only membrane bound.

SCF binds to C-kit (CD117). C-kit is expressed on many different cell types including HSCs, mast cells, germ cells, and melanocytes. Binding of SCF to C-kit induces receptor dimerization and autophosphorylation of tyrosine residues in the cytoplasmic domain (15). Tyrosine phosphorylation initiates multiple signaling pathways including RAS, PI3 kinase, Src, and JAK/STAT. Stem cell factor is highly conserved among mammals. Human SCF protein shares 79% 87% aa sequence identity with dog, cat, mouse, and rat SCF. Rat SCF is active on mouse and human cells, but human SCF is only weakly active on mouse cells (10).

  1. Ashman, L.K. (1999) Int. J. Biochem. Cell Biol. 31:1037. 
  2. Sette, C. et al. (2000) Int. J. Dev. Biol. 44:599. 
  3. Yoshida, H. et al. (2001) J. Invest. Dermatol. Symp. Proc. 6:1. 
  4. Erlandsson, A. et al. (2004) Exp. Cell Res. 301:201. 
  5. Kapur, R. et al. (2002) Blood 100:1287. 
  6. Wang, C.-H. et al. (2007) Arterioscler. Thromb. Vasc. Biol. 27:540. 
  7. Bashamboo, A. et al. (2006) J. Cell Sci. 119:3039. 
  8. Reber, L. et al. (2006) Eur. J. Pharmacol. 533:327.
  9. Kanellakis, P. et al. (2006) Cardiovasc. Res. 70:117.
  10. Martin, F.H. et al. (1990) Cell 63:203.
  11. Arakawa, T. et al. (1991) J. Biol. Chem. 266:18942.
  12. Majumdar, M.K. et al. (1994) J. Biol. Chem. 269:1237.
  13. Brannan, C.I. et al. (1991) Proc. Natl. Acad. Sci. 88:4671.
  14. Anderson, D.M. et al. (1991) Cell Growth Differ. 2:373.
  15. Lemmon, M.A. et al. (1997) J. Biol. Chem. 272:6311.

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Publications for SCF/c-kit Ligand (255-SC)(172)

We have publications tested in 8 confirmed species: Human, Mouse, Hamster, N/A, Porcine, Primate - Macaca fascicularis (Crab-eating Monkey or Cynomolgus Macaque), Primate - Macaca mulatta (Rhesus Macaque), Primate - Papio anubis (Olive Baboon).

We have publications tested in 4 applications: Bioassay, Cell Culture, Differentiation, ELISA (Standard).

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Primate - Macaca fascicularis (Crab-eating Monkey or Cynomolgus Macaque)
Primate - Macaca mulatta (Rhesus Macaque)
Primate - Papio anubis (Olive Baboon)
All Species
Showing Publications 1 - 10 of 172. Show All 172 Publications.
Publications using 255-SC Applications Species
JC Huang, SC Chen, WA Chang, WW Hung, PH Wu, LY Wu, JM Chang, YL Hsu, YC Tsai KITLG Promotes Glomerular Endothelial Cell Injury in Diabetic Nephropathy by an Autocrine Effect International Journal of Molecular Sciences, 2022;23(19):. 2022 [PMID: 36233032] (Cell Culture, Human) Cell Culture Human
R Feng, T Mayuranath, P Huang, PA Doerfler, Y Li, Y Yao, J Zhang, LE Palmer, K Mayberry, GE Christakop, P Xu, C Li, Y Cheng, GA Blobel, MC Simon, MJ Weiss Activation of gamma-globin expression by hypoxia-inducible factor 1alpha Nature, 2022;0(0):. 2022 [PMID: 36224385] (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
D Ávila-Gonz, W Portillo, CP Barragán-Á, G Hernandez-, E Flores-Gar, A Molina-Her, NE Díaz-Martí, NF Díaz The human amniotic epithelium confers a bias to differentiate toward the neuroectoderm lineage in human embryonic stem cells Elife, 2022;11(0):. 2022 [PMID: 35815953] (Bioassay, Human) Bioassay Human
L Liu, A Vujovic, NP Deshpande, S Sathe, G Anande, HTT Chen, J Xu, MD Minden, GW Yeo, A Unnikrishn, KJ Hope, Y Lu The splicing factor RBM17 drives leukemic stem cell maintenance by evading nonsense-mediated decay of pro-leukemic factors Nature Communications, 2022;13(1):3833. 2022 [PMID: 35781533] (Bioassay, Human) Bioassay Human
J Skokowa, B Hernandez, M Coles, M Ritter, M Nasri, J Haaf, N Aghaallaei, Y Xu, P Mir, AC Krahl, KW Rogers, K Maksymenko, B Bajoghli, K Welte, AN Lupas, P Müller, M ElGamacy A topological refactoring design strategy yields highly stable granulopoietic proteins Nature Communications, 2022;13(1):2948. 2022 [PMID: 35618709] (Bioassay, Human) Bioassay Human
JH Hong, JH Kim, KW Kang, BH Lee, Y Park, BS Kim Generation of a human induced pluripotent stem cell line KUMi006 from a patient with multiple myeloma Stem Cell Research, 2022;61(0):102767. 2022 [PMID: 35397398] (Bioassay, Human) Bioassay Human
Y Liu, Y Liu, Y Jia, J Lv, D Sun, Y Yin, N Liu, B Su, G Sun Generation of an induced pluripotent stem cell (iPSC) line from a diabetic patient with glucagon receptor (GCGR) p.W83X mutation Stem Cell Research, 2022;61(0):102745. 2022 [PMID: 35381520] (Bioassay, Human) Bioassay Human
G Iannello, A Patel, D Sirabella, B Corneo, VV Thaker Derivation and characterization of the induced pluripotent stem cell line CUIMCi004-A from a patient with a novel frameshift variant in exon 18a of OCRL Stem Cell Research, 2021;59(0):102635. 2021 [PMID: 35074682] (Bioassay, Human) Bioassay Human
M Sone, S Nakamura, S Umeda, H Ginya, M Oshima, MA Kanashiro, SK Paul, K Hashimoto, E Nakamura, Y Harada, K Tsujimura, A Saraya, T Yamaguchi, N Sugimoto, A Sawaguchi, A Iwama, K Eto, N Takayama Silencing of p53 and CDKN1A establishes sustainable immortalized megakaryocyte progenitor cells from human iPSCs Stem Cell Reports, 2021;0(0):. 2021 [PMID: 34861163] (Bioassay, Human) Bioassay Human
Show All 172 Publications.

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Gene Symbol KITLG