Fig. 1.

A maximum likelihood tree showing the phylogenetic position of strain NkU-1 in the clostridia cluster XIVa. The tree was reconstructed with 1,345 unambiguously aligned nucleotide sequences of 16S rRNA gene using C. symbiosum as an outgroup. In addition to type strains and isolate LIP5 (17), the analysis included sequences of four clones from termite guts: RsStar407 from R. santonensis(16), BCf1–20 from C. formosanus(51), HsH-8 from H. sjoestedti(30), and AspS5-3 from Archotermopsis sp. (30). The accession number for each sequence is shown. Percent bootstrap value in 1,000 replicates when above 50% is shown at each node. Scale bar represents 0.10 substitutions per position.