Fig. 1.

Kaw/Ks increases with decreasing L4W. The Kaw/Ks curve is identical to that in Fig. 2a in ref. ⁸ for MRGX1 vs MRGX4. The number of 4-fold degenerate sites (L4) is superimposed for easy comparison. Shaded areas mark the extracellular domains. The analysis is performed with DAMBE^{24, 25}