FIG. 2.

Phylogenetic tree showing 16S rDNA sequences related to the Clostridiaceae. The majority of the sequences were isolated from the cecal library. The tree was constructed by neighbor-joining analysis of a distance matrix obtained from a multiple-sequence alignment. Bootstrap values (expressed as percentages of 100 replications) are shown at branch points; values of <50 were not considered significant. The cluster was labeled if some sequences exhibited percent identity values of at least 95%.