R-Spondin1/RSPO1 Protein, Human

Measured by its ability to induce Topflash reporter activity in HEK293T human embryonic kidney cells. The ED50 for this effect is typically 110-190 ng/mL in the presence of 5 ng/mL recombinant mouse Wnt3a.

2μg (R: reducing condition, N: non-reducing condition).