New Insights into Ligand-Receptor Pairing and Coevolution of Relaxin Family Peptides and Their Receptors in Teleosts

<table>Estimated proportion of sites in the ligand (<i>x</i>-axis) and receptor (<i>y</i>-axis) genes evolving under (a) purifying, (b) neutral, and (c) positive selection in the genes of the putative ligand-receptor pairs of the RLN/INSL-RXFP system in mammals and teleosts.</table>

International Journal of Evolutionary Biology

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Figure 5

Figure 5: New Insights into Ligand-Receptor Pairing and Coevolution of Relaxin Family Peptides and Their Receptors in Teleosts 