Additional file 4.
Phylogenetic tree based on 37 complete mtDNA sequences from haplogroup R1. Mutations relative to the RSRS  are indicated on the branches. Capital letters are used for transitions and lowercase letters for transversions. Heteroplasmies are labeled using the IUPAC code and capital letters (e.g., 73R). Recurrent mutations are underlined. Reversal mutations are suffixed with “!”. Insertions are indicated by a dot followed by the position number and type of inserted nucleotide(s). Deletions are indicated by a “d” after the deleted nucleotide position. For phylogeny construction, the length variation in the poly-C stretches at nps 303-315 and 16184-16194 was not used. A-C transversions at nps 16182 and 16183 were excluded because of their dependence on the presence of the C-T transition at np 16189. The box containing the sample ID is color coded according to the geographic origin of the sample, and below it the accession number and/or the publication from which it was retrieved is denoted. Coalescence time estimates expressed in kilo years ago are shown next to clade labels and were calculated based on the rho statistic and standard deviation as in [59,90]. The calculator provided by  was used to convert the rho statistics and its error ranges to age estimates with 95% confidence intervals. Sample Azeri10 was excluded from the calculations because of multiple heteroplasmic sites in the sequence.
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Fedorova et al. BMC Evolutionary Biology 2013 13:127 doi:10.1186/1471-2148-13-127