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Table 1 Analyses of the tree topologies for 18 candidates for horizontal gene transfer. Support for putative transfers between Bacteria and Archaea is shown in the B&A column, and between Aquifex and Thermotoga is shown in the A&T column. The compositional bias is listed as "strong", if both the halobacterial sequence and its nearest phylogenetic neighbor failed the test for homogeneous composition. See Materials and Methods for details on performed analyses.

From: An improved probability mapping approach to assess genome mosaicism

ID Functional Assignment B&A A&T Comments Compositional bias
008 thymidylate kinase weak strong - -
020 seryl-tRNA synthetase strong strong - -
054 valyl-tRNA synthetase none strong - Strong
062 excision nuclease chain A none strong - Strong
072 chromosome segregation SMC protein strong None Cyanobacteria, Rickettsia and Aquifex group within Archaea Strong
076 hypothetical protein weak strong Halobacterium groups within Bacteria Strong
080 prolyl-tRNA synthetase none strong Archaeal type homologs are found in some bacteria -
100 hypothetical protein - - Uninterpretable: no resemblance with assumed organismal phylogeny -
105 DNA gyrase, subunit B none strong Archaea do not form a group -
106 arginyl-tRNA synthetase strong weak - Strong
107 DNA gyrase, subunit A none weak Both Thermotoga and Aquifex group with Archaea -
110 cysteinyl-tRNA synthetase strong strong Both Thermotoga and Aquifex group within Archaea -
113 hypothetical protein weak none Both Thermotoga and Aquifex group within Archaea Strong
121 chorismate synthase weak none - -
122 3-phosphoshikimate-1-carboxyvinyltransferase none strong - -
134 histidinol dehydrogenase weak weak Putative paralogs -
144 50S ribosomal protein L2 none strong - -
145 30S ribosomal protein S19 weak strong - -