Figure 3
Changes in the nucleotide composition of the first positions in codons of B. burgdorferi coding sequences from the leading strand under BbTS mutational pressure. Descriptions as for Fig. 1 and 2. Note that the fractions of nucleotides which have not been substituted are exactly as in Fig. 2A but the fractions of nucleotides which substituted other nucleotides are far from being symmetrical to the first ones.