Fig. 2.

Maximum likelihood phylogenetic tree of 16S rRNA gene sequences of cultured and not-yet-cultured bacteria affiliated with the genus Thalassospira. Clusters of sequences obtained in a recent investigation of bacterioplankton chemotaxis in the eastern Mediterranean are included for comparison. Strains included in the present study are marked in boldface. The size bar depicts 0.01 fixed point mutation per nucleotide position. Bootstrap values derived from 100 resamplings are indicated at the nodes.