Figure 5 - full size

 

Figure 5.
Fig. 5. Determinants of specificity of TPO for c-Mpl. Residues that are invariant within the TPO family but not conserved in the EPO family are proposed to confer specificity to the TPO-c-Mpl interaction. These residues fall into two distinct clusters corresponding to the proposed high-affinity (blue) and low-affinity (green) receptor interaction sites. Residues that are invariant in the TPO/EPO family are shown in black.