Reporter assays for Wnt (C), TGFβ (D), BMP4 (E), or FGF (F) signaling in HEK293T cells upon knockdown of GPR37 or LRP5/6. Cells were transfected as described in the
Materials and Methods section, and stimulated with conditioned media (C) or the indicated recombinant proteins (D–F) (mean values ± SD,
n = 3).