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Phylogeny of Pseudomonas stutzeri. 16S rRNA gene sequences identified in asphalt from Pits 91 and 101 of the Rancho La Brea Tar Pits using PCR primers for Pseudomonas spp. Candidate genomovars (gv.) are indicated by vertical bars on the right of the tree. The robustness of the topology was estimated by bootstrap resampling of the neighbor-joining data. Bootstrap values greater than 50 are shown at branch points. Scale bar denotes 0.005 changes per nucleotide.
