Figure 5.

Representation of Sargasso metagenome trpB sequences and those from known bacteria with respect to genetic distance. 40 representatives from trpB sequences analyzed here were chosen for this analysis. As can be seen, the constructed tree shows two distinct groups; however a third group appears which consists of only environmental sequences and the Ple (Pelagibacter ubique (Candidatus)) sequence. The abbreviation of trpB genes from known bacteria are listed in Table 8. For the environmental trpB sequences abbreviation the NCBI accession numbers were taken. Bootstraps for the main groups are shown.