Figure 3.

Maximum likelihood phylogenetic tree inferred from the amino acid sequence deduced from a fragment of the luxS gene transcripts obtained from the high and low T biofilm communities collected from deep-sea hydrothermal vents on the East Pacific Rise. The tree shows the position of the biofilm-derived LuxS sequences relative to that of pure cultures of Epsilonproteobacteria. The model organisms, Caminibacter mediatlanticus and Sulfurovum lithotrophicum, are shown in bold face. Percentages >50% of 100 bootstrap resampling that support each topological element are shown at the branch nodes. Bar, 10% estimated substitutions.