
Comparison of CpG and UpA composition in RNA viruses infecting mammals and birds. Observed/expected ratios of (A) CpG and (B) UpA RNA viruses (listed in Supplemental Data Tables S11, S12) infecting mammals and birds. Ratios have been overlaid on values for avian (chicken) mRNA sequences to provide context. Analysis restricted to coding sequences of length >450 bases.










