Fig. 4
From: DNA polymorphism and selection at the bindin locus in three Strongylocentrotus sp. (Echinoidea)
Sliding window plots of polymorphism-to-divergence ratio, and the average sliding G value along the bindin genes of S. intermedius, S. pallidus, and S. droebachiensis. The bindin sequence of S. polyacanthus (AF077317) was used as an outgroup. Window size is 10 variable substitutions for the polymorphism-to-divergence ratio and 12 variable substitutions for the average sliding G value. Other comments see Fig. 3