References of genome data

Comparative genomic analysis was performed, using 23 complete prokaryotic genomes : Haemophilus influenzae1 (NC_000907), Mycoplasma genitalium2 (NC_000908), Methanococcus jannaschii3 (NC_000909), Synechocystis sp.4 (NC_000911), Mycoplasma pneumoniae5 (NC_000912), Helicobacter pylori 266956 (NC_000915), Helicobacter pylori J997 (NC_000921), Escherichia coli8 (NC_000913), Methanobacterium thermoautotrophicum9 (NC_000916), Bacillus subtilis10 (NC_000964), Archaeoglobus fulgidus11 (NC_000917), Borrelia burgdorferi12 (NC_001318), Aquifex aeolicus13 (NC_000918), Pyrococcus horikoshii14 (NC_000961), Pyrococcus abyssi (NC_000868), Mycobacterium tuberculosis15 (NC_000962), Treponema pallidum 16 (NC_000919), Chlamydia trachomatis17 (NC_000117), Rickettsia prowazekii18 (NC_000963), Chlamydia pneumoniae19 (NC_000922), Aeropyrum pernix20 (NC_000854), Thermotoga maritina21 (NC_000853), and Buchnera sp. APS. These sequence data, except Buchnera genome, were obtained from Entrez Genomes at NCBI website (

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