Figure 7

Three alternative branch patterns caused by evolutionary correlations. The branching position of the 4th sequence depends on nucleotide substitutions between the 1st sequence and the 2nd and 3rd sequences, and cannot be uniquely determined by the maximum parsimony criterion. Figure 7a shares one of two sites. Figure 7b shares two of three sites. Figure 7c shares two of four sites. Here, A n→ C denotes a substitution from A to C at the n th site.