An error occurred during the process of publishing this article. The correct Fig. 2 is shown below.
Fig. 2.
Ribosomal protein-based phylogenetic tree of Clostridium acidurici and related species. Members of the proposed genera Gottschalkia and Andreesenia are shown in bold. Roman numerals on the right indicate the clostridial cluster assignments of Collins et al. [4]. The tree was reconstructed essentially as described previously [9, 22]. Fifty sets of ribosomal proteins (L1–L7, L9–L11, L13–L24, L27–L29, L31–L36 and S2–S20) were extracted from the respective genomic entries (listed in Table S1) and aligned using muscle [48]; gapped columns (with more than 30 % of gaps) and columns with low information content were removed from the alignments. Individual ribosomal protein alignments were concatenated, giving a total of 6238 positions, and a maximum-likelihood tree was reconstructed using the PhyML program [49], the latest version of which (http://www.atgc-montpellier.fr/phyml-sms/) includes automatic selection of the best-fit substitution model for a given alignment and calculation of branch support values using aBayes algorithm [50]. The tree was rooted using the sequences from C. butyricum and C. cylindrosporum .
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