Figure 2.

Phylogenetic tree (A) and alignment of partial amino acid sequences (B) of ParB in various bacteria. Forty-three ParB members were found in databases by using the blast algorithm. The ParB homologues that belong to the chromosomal group are indicated in blue and those from the extrachromosomal group in pink. In the aligned sequences, conserved residues and conservative substitutions (V/I/L, T/S, D/E, N/Q, Y/F, R/K) are shaded in red if present in 34 or more sequences of 43 ParB homologues, in green if present in 26 or more sequences of 31 ParB homologues on the chromosomes, and in orange if present in 8 or more sequences of 12 ParB homologues on extrachromosomal elements. * parB genes in the extrachromosomal group were located on chromosomes; ^†parB genes in the chromosomal group were located on plasmids.