FIGURE 2

Schematic diagram of parathyroid hormone (PTH) and analogues as activators of two separate pathways for extracellular signal kinase activation, namely G-protein-dependent (blue) and -arrestin G-protein-independent (red). PTH-1A=[D-Trp¹²,Tyr³⁴]PTH-(7–34). Data from Gesty-Palmer et al. (2006).