Figure 3.

Phylogenetic tree of partitioning proteins (ParAs) encoded within the Arthrobacter plasmids. The analysis was based on 39 sequences of the ParA proteins (122 amino acid positions) encoded within the Arthrobacter plasmids. Additionally, 23 reference ParA sequences of other bacteria, previously used by Mihasan (2015), were included in this analysis. The unrooted tree was constructed using the Maximum Likelihood method based on the Le and Gascuel model (Le and Gascuel, 2008). The tree is drawn to scale, with branch lengths measured in the number of substitutions per site. Statistical support for the internal nodes was determined by 1,000 bootstrap replicates and values of ≥50% are shown. Accession numbers of the protein sequences used for the analysis are given in brackets. Clusters I–IV group ParA proteins of Arthrobacter plasmids, with reference to previously proposed clustering (Mihasan, 2015). The names of plasmids analyzed in this work are in bold text.