Recombinant Mouse R-Spondin 2 Protein


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Product Details

Reactivity MuSpecies Glossary
Applications Bioactivity

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Recombinant Mouse R-Spondin 2 Protein Summary

Details of Functionality
Measured by its ability to induce Topflash reporter activity in HEK293T human embryonic kidney cells. The ED50 for this effect is typically 0.4-2.4 ng/mL in the presence of 5 ng/mL Recombinant Mouse Wnt‑3a (Catalog # 1324-WN).
Chinese Hamster Ovary cell line, CHO-derived mouse R-Spondin 2 protein
Accession #
N-terminal Sequence
Predicted Gln22, not observed that sequencing might be blocked & Ala32
Protein/Peptide Type
Recombinant Proteins
>95%, 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.


Theoretical MW
21 kDa & 20 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.
26-27 kDa, reducing conditions
Read Publications using
6946-RS 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.
>95%, by SDS-PAGE under reducing conditions and visualized by silver stain
Reconstitution Instructions
Reconstitute at 100 μg/mL in 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 Mouse R-Spondin 2 Protein

  • Cristin 2
  • hRspo2
  • MGC35555
  • MGC43342
  • Roof plate-specific spondin-2
  • RSPO2
  • R-spondin 2 homolog (Xenopus laevis)
  • RSpondin 2
  • R-Spondin 2
  • R-spondin-2


Roof plate-specific Spondin 2 isoform 1 (R‑Spondin 2, RSPO2), also known as cysteine‑rich and single thrombospondin domain containing protein 2 (Cristin 2), is a 33 kDa secreted protein that belongs to the R‑Spondin family (1‑3). The four R‑Spondins regulate Wnt/ beta -catenin signaling and overlap in expression and function (1‑3). Like other R‑Spondins, RSPO2 contains two adjacent cysteine‑rich furin-like domains (aa 90‑134) followed by a thrombospondin (TSP-1) motif (aa 144‑204) and a C-terminal region rich in basic residues (aa 207‑243). The basic region binds heparin and mediates cell surface retention and extracellular matrix attachment while the furin-like domains are required for Wnt/ beta -catenin signaling (1, 3, 4). RSPO2 contains one potential N‑glycosylation site. Mature mouse RSPO2 shares 97‑98% aa identity with human, rat, equine, canine and bovine RSPO2 and ~40% aa identity with RSPO1, RSPO3 and RSPO4. One potential 237 aa mouse isoform diverges after aa 206 and lacks a basic region (5). Human RSPO2 is expressed in organs of endodermal origin in adults, including intestine and lung, and is down‑regulated in tumors of these tissues (1). In the embryonic mouse, RSPO2 expression is concentrated in the apical epidermal ridge, hippocampus, and developing muscle, teeth and bones (1, 6). Deletion of RSPO2 results in down‑regulation of Wnt activity in these areas, malformations of the facial skeleton and limbs, and respiratory failure at birth (7-9). RSPO2 is an extracellular potentiator of Wnt/ beta -catenin signaling (3, 4). It functions at least in part by binding LRP-6, stimulating its long-term phosphorylation and down‑regulating its internalization (3, 4). RSPO proteins, especially RSPO2 and RSPO3, also antagonize DKK1 activity by interfering with DKK1‑mediated LRP-6 and Kremen association (10).

  1. Kazanskaya, O. et al. (2004) Dev. Cell 7:525.
  2. Kim, K.-A. et al. (2006) Cell Cycle 5:23.
  3. Nam, J.-S. et al. (2006) J. Biol. Chem. 281:13247.
  4. Li, S-J. et al. (2009) Cell Signal. 21:916.
  5. Entrez accession # EDL08755.
  6. Nam, J.-S. et al. (2007) Gene Expr. Patterns 7:306.
  7. Yamada, W. et al. (2009) Biochem. Biophys. Res. Commun. 381:453.
  8. Jin, Y.-R. et al. (2011) Dev. Biol. 352:1.
  9. Nam, J.-S. et al. (2007) Dev. Biol. 311:124.
  10. Kim, K.-A. et al. (2007) Mol. Biol. Cell 19:2588.

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Publications for R-Spondin 2 (6946-RS)(2)

We have publications tested in 1 confirmed species: Mouse.

We have publications tested in 1 application: Bioassay.

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Gene Symbol Rspo2