Additional file 1.

Table showing the taxonomic distribution of DnaJ-Fer, DnaK, DnaJ and GrpE proteins in Archaea. Numbers correspond to accession numbers in the NCBI Genpep database in the 92 complete genomes available in July 2011 and that of, 'Ca. Nitrosoarchaeum koreensis', a thaumarchaeotal genome available more recently. The two divergent sequences of DnaK and GrpE found in Methanococcus vannielii SB are underlined.

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Petitjean et al. BMC Evolutionary Biology 2012 12:226   doi:10.1186/1471-2148-12-226