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Phylogenetic tree showing relationships of the translated PmoA sequences (160 positions) uncovered in this work to the sequences from known type I and type II methanotrophs and to the sequences of uncultivated organisms. The Nitrosospira multiformis sequence was used as an outgroup. A distance algorithm (Protdist) was employed, with 1,000 bootstrap analyses. Closed circles indicate bootstrap support of over 90%, and open circles indicate bootstrap support of over 55%.
