Recombinant Human Wnt/RSPO2 Agonist Protein, CF New
Improve your stem cell and organoid cultures with our New Wnt/R-Spondin Agonist Proteins (Catalog # BT-WRSP1, # BT-WRSP2, and # BT-WRSP3). These proteins exhibit similar or higher activity than the individual Wnt-3a and R-Spondin proteins together, simplifying experiments and providing time and cost savings. See the data in this Application Note.
Recombinant Human Wnt/RSPO2 Agonist Protein, CF Summary
Product Specifications
Proprietary
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Product Datasheets
Carrier Free
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.
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.
BT-WRSP2
Formulation | Lyophilized from a 0.2 μm filtered solution in PBS with Trehalose. |
Reconstitution | Reconstitute at 500 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.
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Scientific Data

Recombinant Human Wnt/RSPO2 Agonist Protein (Catalog # BT-WRSP2) activates TCF reporter activity in HEK293 human embryonic kidney cells. The ED50 for this effect is 6.00‑72.0 ng/mL.

2 μg/lane of Recombinant Human Wnt/RSPO2 Agonist Protein (Catalog # BT-WRSP2) was resolved with SDS-PAGE under reducing (R) and non-reducing (NR) conditions and visualized by Coomassie® Blue staining, showing bands at 83-97 & >190 kDa under reducing conditions.
Background: Wnt/RSPO2
Wnt signaling is known to promote self-renewal of adult stem cells. R-Spondins amplify Wnt signaling in adult stem cells by binding to LGR5 receptors resulting in increased levels of Wnt receptor localization at the membrane surface. Many current organoid protocols include addition of Wnt-3a and R-Spondin proteins to the media for optimal adult stem cell maintenance and health of organoids. Fusion proteins known known as Wnt Surrogates have been described that have enhanced solubility when compared to the widely used Wnt-3a protein and mirror the activities of Wnt signaling.1 R&D Systems has constructed recombinant fusion proteins designed to bind elements of the Wnt receptor system including LGR-5, Frizzled, and LRP-5/6. These can initiate canonical Wnt signaling and are designed to simplify cell culture protocols by substituting for conditioned media or the addition of recombinant Wnt and R-Spondin.
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