FIG. 6.

Phylogenetic dendrogram of the OP11 division. The habitat source of each environmental sequence is indicated before the clone name. GenBank accession numbers are listed parenthetically. Subdivisions (see the text) are indicated by brackets at the right of the tree. Tree construction and support for branch points was as described for Fig. 1 and 3, respectively. The four MIM clones and F78 clone are unreleased sequences generously made available to us by Pascale Durand (10) and Floyd Dewhirst (8). The scale bar indicates 0.1 change per nucleotide.