Comparison of position-by-position nucleotide diversity values for paleoAP3 and euAP3 motif encoding loci (see also Add. Files 4-6). The yellow bars indicate the values for a dataset including all TM6 lineage members and basal eudicot paleoAP3 loci. The codon positions of each nucleotide and the corresponding amino acids are shown immediately below the chart. Third positions are highlighted in yellow. The blue bars indicate the values for a dataset including all euAP3 lineage members. The codon positions of each nucleotide and the corresponding amino acid are shown at the bottom, with third positions highlighted in blue. The position of the euAP3 frameshift is represented by a dash mark. Note that some of the euAP3 positions have zero nucleotide diversity. n/a = not applicable.