Figure 5
PhyML phylogenetic tree of 16S rDNA sequences of metagenomic sequences and SAR11 reference sequence. Each SAR11 is color-coded by subgroup: subgroup 1a (dark purple), subgroup 1b (light purple), subgroup 2 (blue), and subgroups 3 and 4 (grey). The numbers specify how many sequences were placed at each node. Red numbers indicate metagenomics sequences outside clades containing reference sequence(s).
