Figure 2From: Codon usage in vertebrates is associated with a low risk of acquiring nonsense mutationsStop risk factor F in the coding sequences (CDS) of 40 species. F characterizes the relative risk of acquiring nonsense mutations and is shown for 40 species in 5 groups. The black bar represents the mean. The CDS in a species with an unbiased codon usage has an F = 1.0 (dotted line).Back to article page