Additional File 1.The document contains protein sequence alignments used for phylogenetic analyses and resulting phylogenetic trees. Each sequence name includes a GenBank GI number followed by the species name Format: PDF Size: 5.8MB Download file This file can be viewed with: Adobe Acrobat Reader Huang and Gogarten Genome Biology 2007 8:R99 doi:10.1186/gb-2007-8-6-r99 |