Figure 2

Phylogenetic tree of the 17 phylotypes recovered from the clone library obtained from faeces from three polar bears in Svalbard, Norway (bold). Evolutionary distance was calculated using the Kimura-2 parameter model for nucleotide change and the tree was constructed using the neighbor-joining method. Statistical significance of branching was verified by bootstrapping. The scale bar represents a 5% estimated sequence divergence, and reference sequences were obtained from the GenBank Database.