Table 1.

List of completed genome sequences (sources: The Institute for Genomic Research (TIGR, Rockville, MD) and PUBMED).

Microorganisms			Size (Mb)	Reference
Order		Species
Crenarchaeota
	Desulfurococcales	Aeropyrum pernix K1	1.6	Kawarabayasi et al. 1999
	Sulfolobales	Sulfolobus solfataricus P2	2.9	She et al. 2001
		Sulfolobus tokodaii	2.7	Kawarabayasi et al. 2001
Euryarchaeota
	Archaeoglobales	Archaeoglobus fulgidus DSM 4304	2.1	Klenk et al. 1997
	Halobacteriales	Halobacterium sp. NRC-1	2.0	Ng et al. 2000
	Methanobacteriales	Methanobacterium thermoautotrophicum DH	1.7	Smith et al. 1997
	Methanococcales	Methanococcus jannaschii DSM 2661	1.6	Bult et al. 1996
		Methanosarcina acetivorans C2A	5.7	Galagan et al. 2002
	Methanopyrales	Methanopyrus kandleri	1.7	Slesarev et al. 2002
	Thermococcales	Pyrococcus horikoshii (shinkaj) OT3	1.7	Kawarabayasi et al. 1998
		Pyrococcus abyssi GE5	1.7	unpublished
	Thermoplasmales	Thermoplasma acidophilum DSM 1728	1.5	Ruepp et al. 2000
		Thermoplasma volcanium GSS 1	1.5	Kawashima et al. 2000