Figure 3From: The more we know, the more we have to discover: an exciting future for understanding cilia and ciliopathies Example of signalling at the primary cilium. (A) TGFβ/BMP signalling at the primary cilium. (B) TGFβ-RI (green) and P-smad2/3 (red) are recruited at the base of the primary cilium (blue) in TGFβ1-stimulated human foreskin fibroblasts (credit: [17]).Back to article page