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. 2011 Sep 14;6(9):e24457. doi: 10.1371/journal.pone.0024457

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Brindefalk et al.

This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are properly credited.

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A phylogenetic inference of the alphaproteobacterial tree topology based on a concatenated alignment of 42 mitochondrially encoded proteins reveals a well-supported alphaproteobacterial phylogeny, in which the SAR11 clade, here represented by Ca. Pelagibacter ubique is placed among the free-living alphaproteobacteria rather than with the Rickettsiales. The tentative placement of the outgroup (OG) is indicated with an arrow. Phylogenies were produced using Bayesian methods with the CAT model. Posterior-probability values of 1 are not shown.