Recombinant Human sFRP-5 Protein, CF

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Recombinant Human sFRP-5 Protein, CF Summary

Product Specifications

>95%, 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 Topflash reporter activity in HEK293T human embryonic kidney cells. The ED50 for this effect is 0.2-2 μg/mL in the presence of 750 ng/mL Recombinant Human Wnt‑3a (Catalog # 5036-WN).
Chinese Hamster Ovary cell line, CHO-derived human sFRP-5 protein
Glu30-His317, with an N-terminal HA (YPYDVPDYA) tag
Accession #
N-terminal Sequence
Tyr (HA), Trp37 & Ser46
Predicted Molecular Mass
33.8, 32.7 & 30.7 kDa
30-40 kDa, reducing conditions

Product Datasheets

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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 and NaCl.
Reconstitution Reconstitute at 100 μg/mL in 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: sFRP-5

Secreted Frizzled Related Protein-5 (sFRP-5), also known as SARP-3, belongs to a family of Wnt‑binding proteins with homology to the ligand‑binding domain of the Frizzled receptors. sFRPs are approximately 30-35 kDa in size and contain an N‑terminal Frizzled-like domain with 10 conserved cysteines and a Netrin-like C-terminal domain (1-3). Mature human sFRP-5 shares 96% aa sequence identity with mouse and rat sFRP‑2 (4). During embryonic development, sFRP-5 is expressed in the anterior visceral endoderm, neural tube, foregut epithelium, and proliferating and prehypertrophic chondrocytes (5-8). sFRP-5 activity is required for the development of foregut, liver, ventral pancreas, and somites (6, 7). In the adult, sFRP-5 is expressed in the retinal pigment epithelium and pancreas (4, 9). sFRP-5 binds and antagonizes the function of mammalian Wnt-5a and Wnt-11 as well as Xenopus Xwnt-8, resulting in an inhibition of both canonical and non-canonical Wnt signaling (7, 9, 10). sFRP-5 down‑regulation is common in breast and gastric cancer cells and is correlated with poor prognosis (11-13). It functions as a tumor suppressor by inhibiting epithelial‑mesenchymal transition, invasiveness, and tumorigenicity of ovarian cancer cells (14). sFRP-5 plays an important role in maintaining glucose handling and insulin sensitivity (10). It is secreted by adipocytes and is down‑regulated in mouse models of obesity and type 2 diabetes (10).

  1. Bovolenta, P. et al. (2008) J. Cell Sci. 121:737.
  2. van Amerongen, R. and R. Nusse (2009) Development 136:3205.
  3. Rattner, A. et al. (1997) Proc. Natl. Acad. Sci. 94:2859.
  4. Melkonyan, H.S. et al. (1997) Proc. Natl. Acad. Sci. 94:13636.
  5. Leaf, I. et al. (2006) Genesis 44:573.
  6. Satoh, W. et al. (2008) Genesis 46:92.
  7. Li, Y. et al. (2008) Genes Dev. 22:3050.
  8. Witte, F. et al. (2009) Gene Expr. Patterns 9:215.
  9. Chang, J. et al. (1999) Hum. Mol. Genet. 8:575.
  10. Ouchi, N. et al. (2010) Science 329:454.
  11. Veeck, J. et al. (2008) Carcinogenesis 29:991.
  12. Zhao, C. et al. (2009) BMC Cancer 9:224.
  13. Ho, C.M. et al. (2010) Eur. J. Clin. Invest. 40:310.
  14. Su, H.Y. et al. (2010) Int. J. Cancer 127:555.
Long Name
Secreted Frizzled Related Protein 5
Entrez Gene IDs
6425 (Human); 54612 (Mouse)
Alternate Names
frizzled-related protein 1b; FRP1B; FRP-1b; SARP3; SARP-3; secreted apoptosis related protein 3; secreted apoptosis-related protein 3; secreted frizzled-related protein 5; sFRP5; sFRP-5

Citations for Recombinant Human sFRP-5 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.

5 Citations: Showing 1 - 5
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  1. Chemically-Defined, Xeno-Free, Scalable Production of hPSC-Derived Definitive Endoderm Aggregates with Multi-Lineage Differentiation Potential
    Authors: A Sahabian, M Sgodda, O Naujok, R Dettmer, J Dahlmann, F Manstein, T Cantz, R Zweigerdt, U Martin, R Olmer
    Cells, 2019;8(12):.
    Species: Human
    Sample Types: Whole Cells
    Applications: Bioassay
  2. Macrophage LRP1 Promotes Diet-Induced Hepatic Inflammation and Metabolic Dysfunction by Modulating Wnt Signaling
    Authors: DT Au, M Migliorini, DK Strickland, SC Muratoglu
    Mediators Inflamm., 2018;2018(0):7902841.
    Species: Human
    Sample Types: Protein
    Applications: Surface Plasmon Resonance
  3. Effect of SFRP5 (Secreted Frizzled-Related Protein 5) on the WNT5A (Wingless-Type Family Member 5A)-Induced Endothelial Dysfunction and Its Relevance With Arterial Stiffness in Human Subjects
    Authors: YK Cho, YM Kang, SE Lee, Y Lee, SM Seol, WJ Lee, JY Park, CH Jung
    Arterioscler. Thromb. Vasc. Biol., 2018;0(0):.
    Species: Human
    Sample Types: Whole Cells
    Applications: Cell Culture
  4. Effect of Sfrp5 on cytokine release and insulin action in primary human adipocytes and skeletal muscle cells.
    Authors: Carstensen M, Wiza C, Rohrig K, Fahlbusch P, Roden M, Herder C, Ouwens D
    PLoS ONE, 2014;9(1):e85906.
    Species: Human
    Sample Types: Whole Cells
    Applications: Bioassay
  5. Widespread potential for growth-factor-driven resistance to anticancer kinase inhibitors.
    Authors: Wilson TR, Fridlyand J, Yan Y, Penuel E, Burton L, Chan E, Peng J, Lin E, Wang Y, Sosman J, Ribas A, Li J, Moffat J, Sutherlin DP, Koeppen H, Merchant M, Neve R, Settleman J
    Nature, 2012;487(7408):505-9.
    Species: Human
    Sample Types: Whole Cells
    Applications: Bioassay


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