Recombinant Mouse Erythropoietin R Fc Chimera Protein, CF

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Recombinant Mouse Erythropoietin R Fc Chimera Protein, CF Summary

Product Specifications

>90%, by SDS-PAGE under reducing conditions and visualized by silver stain
Endotoxin Level
<0.10 EU per 1 μg of the protein by the LAL method.
Measured by its ability to inhibit Epo-dependent proliferation of TF‑1 human erythroleukemic cells. Kitamura, T. et al. (1989) J. Cell Physiol. 140:323. The ED50 for this effect is 12.5-50 ng/mL in the presence of 16 ng/mL of rmEpo.
Mouse myeloma cell line, NS0-derived mouse Erythropoietin R protein
Mouse Epo R
(Ala25 - Pro249)
Accession # P14753
(Pro100 - Lys330)
N-terminus C-terminus
Accession #
N-terminal Sequence
Structure / Form
Disulfide-linked homodimer
Predicted Molecular Mass
51.3 kDa (monomer)
60 kDa, reducing conditions

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Carrier Free

What does CF mean?

CF stands for Carrier Free (CF). We typically add Bovine Serum Albumin (BSA) as a carrier protein to our recombinant proteins. Adding a carrier protein enhances protein stability, increases shelf-life, and allows the recombinant protein to be stored at a more dilute concentration. The carrier free version does not contain BSA.

What formulation is right for me?

In general, we advise purchasing the recombinant protein with BSA for use in cell or tissue culture, or as an ELISA standard. In contrast, the carrier free protein is recommended for applications, in which the presence of BSA could interfere.


Formulation Lyophilized from a 0.2 μm filtered solution in PBS, EDTA and CHAPS.
Reconstitution Reconstitute at 100 μg/mL in sterile PBS.
Shipping The product is shipped at ambient temperature. Upon receipt, store it immediately at the temperature recommended below.
Stability & Storage: 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.
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Background: Erythropoietin R

Erythropoietin (Epo), a glycoprotein produced primarily by the kidney, is the principal factor that regulates erythropoiesis by stimulating the proliferation and differentiation of erythroid progenitor cells. The biological effects of Epo are mediated by the erythropoietin receptor (Epo R). A member of the hematopoietic growth factor receptor superfamily which includes IL-2, IL-3, IL-4, IL-5, IL-6, IL-7, GM-CSF, G-CSF, thrombopoietin, LIF, CNTF, growth hormone, and prolactin, Epo R is expressed not only by erythroid cells but also by embryonic stem cells, endothelial cells, and neural cells (1). Mouse Epo R cDNA encode a type I membrane-spanning protein with 507 amino acid (aa) residues. Mouse Epo R has a 24 aa hydrophobic signal peptide, a 225 aa extracellular domain, a 22 aa transmembrane domain, and a 236 aa intracellular domain. At the protein sequence level, the human Epo R is approximately 82% identical to the mouse protein (2). Mouse and human Epo R both contain 11 cysteine residues and an N-linked glycosylation site. Mouse Epo R, however, contains two disulfide bridges not found with human Epo R. In common with other hematopoietic growth factor receptor superfamily members, mouse Epo R has 4 positionally conserved cysteines in its extracellular domain, a tryptophan-serine-X-tryptophan-serine (WSXWS) motif or its homolog located near the transmembrane region, and lacks kinase motifs in its intracellular domain. Based on its amino acid composition the molecular weight of Epo R would be 55 kDa but after post translational modification including glycosylation and tyrosine and serine-threonine phosphorylation the molecular weight can be as high as 78 kDa (1). As a result of alternative splicing of the Epo R gene, cDNA clones encoding a truncated form of the Epo R as well as a soluble form of Epo R has been found (2, 3). The presence of a soluble form of the Epo R has also been detected in human sera. Recombinant soluble Epo R binds Epo with high affinity and is a potent Epo antagonist (3).

  1. Spivak, J.L. (2001) in Cytokine Reference, Oppenhiem, J.J. and M. Feldmann, eds. Academic Press, New York, p. 941.
  2. Kuramochi, S., Y. Ikawa and K. Todokoro (1990) J. Mol. Biol. 216:567.
  3. Baynes, R.D. et al. (1993) Blood 82:2088.
Long Name
Erythropoietin Receptor
Entrez Gene IDs
2057 (Human); 13857 (Mouse)
Alternate Names
EpoR; EPO-R; Erythropoietin R; erythropoietin receptor; MGC138358

Citation for Recombinant Mouse Erythropoietin R Fc Chimera Protein, CF

R&D Systems personnel manually curate a database that contains references using R&D Systems products. The data collected includes not only links to publications in PubMed, but also provides information about sample types, species, and experimental conditions.

1 Citation: Showing 1 - 1

  1. HIF prolyl hydroxylase inhibition protects skeletal muscle from eccentric contraction-induced injury
    Authors: AN Billin, SE Honeycutt, AV McDougal, JP Kerr, Z Chen, JM Freudenber, DK Rajpal, G Luo, HF Kramer, RS Geske, F Fang, B Yao, RV Clark, J Lepore, A Cobitz, R Miller, K Nosaka, AC Hinken, AJ Russell
    Skelet Muscle, 2018;8(1):35.
    Species: Mouse
    Sample Types: In Vivo
    Applications: In Vivo


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