（ゲノムサイズ昇順）　ORF数および機能不明ORF数は配列決定当時の値を使っています。

Species	Kingdom	Size (MB)	ORF	Function Unkown		Reference
Leishmania major Chr1	Eukaryote	0.03	79	41	52%	Myler et al.	Pro.Natl. Acad. Sci. USA 96: 2902-2906 (1999)
Cryptomonad nucleomorph chromosomes	Bacteria	0.55	464	219	47%	Douglas et. al.	Nature 410: 1091-1096 (2001)
Mycoplasma genitalium	Bacteria	0.58	470	96	20%	Fraser et. al.	Science 270:397-403 (1995)
Buchnera sp. APS	Bacteria	0.64	583	83	14%	Shigenobu et al.	Nature 407:81-86 (2000)
Ureaplasma urealyticum	Bacteria	0.75	613	288	47%	Glass et al.	Nature 407:757-762 (2000)
Mycoplasma pneumoniae	Bacteria	0.81	677	163	24%	Himmelreich et. al.	Nuc. Acid Res. 24:4420-4449 (1996)
Plasmodium falciparum Chr 2	Eukaryote	1.00	209	90	43%	Gardner et. al.	Science 282:1126-1132 (1998)
Chlamydia trachomatis SerovarD	Bacteria	1.05	894	290	32%	Stephens et al.	Science 282:754-759 (1998)
Plasmodium falciparum Chr 3	Eukaryote	1.06	215	138	64%	Bowman et. al.	Nature 400:532-538 (1999)
Chlamydia trachomatis MoPn	Bacteria	1.07	924	296	32%	Read et al.	Nuc. Acid Res. 28:1397-1406 (2000)
Vibrio cholerae EI Tor N16961 Chr 2	Bacteria	1.07	1,115	650	59%	Heidelberg et al	Nature 406:477-483 (2000)
Rickettsia prowazekii	Bacteria	1.10	834	311	37%	Andersson et al.	Nature 396:133-140 (1998)
Treponema pallidum	Bacteria	1.14	1,041	468	45%	Fraser et al.	Science 281:375-388 (1998)
Chlamydia pneumoniae J138	Bacteria	1.23	1,072	425	40%	Shirai et al.	Nuc. Acid Res. 28: 2311-2314 (200)
Chlamydia pneumoniae CWL029	Bacteria	1.23	1,073	421	40%	Kalman et al.	Nat. Genet 21:385-389 (1999)
Chlamydia pneumoniae AR39	Bacteria	1.23	1,052	421	40%	Read et al.	Nuc. Acid Res. 28:1397-1406 (2000)
Borrelia burgdorferi	Bacteria	1.44	853	350	41%	Fraser et al.	Nature 390:580-586 (1997)
Aquifex aeolicus	Bacteria	1.50	1,512	663	44%	Deckert et al.	Nature 392:353 (1998)
Thermoplasma acidophilum	Archea	1.56	1,509	686	45%	Ruepp et al.	Nature 407:583 (2000)
Campylobacter jejuni	Bacteria	1.64	1,654	367	22%	Parkhill et al.	Nature 403:665-668 (2000)
Helicobacter pylori J99	Bacteria	1.64	1,495	600	40%	Alm et.al.	Nature 397:176-180 (1999)
Helicobacter pylori	Bacteria	1.66	1,590	522	33%	Tomb et. al.	Nature 388:539-547 (1997)
Methanococcus jannaschii	Archea	1.66	1,738	1,078	62%	Bult et. al.	Science 273:1058-1073 (1996)
Aeropyrum pernix	Archea	1.67	2,694	1,538	57%	Kawarabayasi et al.	DNA Research 6:83-101 (1999)
Methanobacterium thermoautotrophicum	Archea	1.75	1,855	1,002	54%	Smith et.al.	J. Bacteriology 179:7135-7155 (1997)
Pyrococcus abyssi	Archea	1.76	1,765	495	28%	Daniel Prieur et al.
Pyrococcus horikoshii (OT3)	Archea	1.80	2,061	1,655	80%	Kawarabayasi et al.	DNA Research 5:55-76 (1998)
Thermotoga maritima	Bacteria	1.80	1,877	863	46%	Nelson et al.	Nature 399:323-329 (1999)
Haemophilus influenzae Rd	Bacteria	1.83	1,743	736	42%	Fleischmann et. al.	Science 269:496-512 (1995)
Archaeoglobus fulgidus	Archea	2.18	2,436	639	26%	Klenk et al.	Nature 390:364-370 (1997)
Neisseria meningitidis Z2491	Bacteria	2.18	2,121	743	35%	Parkhill et al.	Nature 404:502-506 (2000)
Pasteurella multocida	Bacteria	2.25	2,014	731	36%	May et al.	Proc. Natl. Acad. Sci. USA 98:3460-3465 (2001)
Neisseria meningitidis MC58	Bacteria	2.27	2,158	999	46%	Tettelin et al.	Science 287:1809-1815 (2000)
Lactococcus lactis	Bacteria	2.35	1,495	700	47%	Bolotin et al.	Antonie Van Leeuwenhoek 76:27-76 (1999)
Halobacterium sp. NRC-1	Archea	2.57	2,630	1,563	59%	Victor et al.	Pro. Natl. Acad. Sci USA 97:12176-12181 (2000)
Xylella fastidiosa	Bacteria	2.68	2,782	1,499	54%	The Xylella fastidiosa Consortium	Nature 406:151-159 (2000)
Staphylococcus aureus	Bacteria	2.81	2,594	833	32%	Kuroda et al	Lancet 357:1225-1240 (2001)
Vibrio cholerae EI Tor N16961 Chr1	Bacteria	2.96	2,770	1,156	42%	Heidelberg et al	Nature 406:477-483 (2000)
Mycobacterium leprae	Bacteria	3.27	1,604	919	57%	Cole et al.	Nature 409:1007-1011 (2001)
Deinococcus radiodurans	Bacteria	3.28	3,187	1,694	53%	White et al.	Science 286:1571-1577 (1999)
Synechocystis sp. PCC 6803	Bacteria	3.57	3,168	1,768	56%	Kaneko et. al.	DNA Res. 3:109-136 (1996)
Caulobacter crescentus	Bacteria	4.01	3,767	1,737	46%	Nierman et.al.	Pro. Natl. Acad. Sci USA 98:4136-4141 (2001)
Bacillus subtilis	Bacteria	4.20	4,100	1,722	42%	Kunst et.al.	Nature 390:249-256(1997)
Bacillus halodurans	Bacteria	4.20	4,066	1,925	47%	Takami et.al.	Nuc. Acids Res. 28:4317-4331 (2000)
Mycobacterium tuberculosis	Bacteria	4.40	3,924	1,521	39%	Cole et al.	Nature 393:537-544 (1998)
Escherichia coli K12	Bacteria	4.60	4,288	1,629	38%	Blattner et. al.	Science 277:1453-1474 (1997)
Escherichia coli O157	Bacteria	5.50	5,361	1,062	20%	Nicole et. al.	Nature 409:529-533 (2001)
Pseudomonas aeruginosa	Bacteria	6.26	5,570	2,549	46%	Stover et al.	Nature 406:959-964 (2000)
Saccharomyces cerevisiae	Eukaryote	13.00	5,885	3,000	49%	Goffeau et. al.	Science 274:563-567 (1996)
Caenorhabditis elegans	Eukaryote	97.00	19,099	11,140	60%	The C.elegans Sequencing Consotrium	Science 282:2012-2018 (1998)
Arabidopsis thaliana	Eukaryote	115.40	25,498	7,649	30%	The Arabidopsis Genome Intitiative	Nature 408:796-815 (2000)
Drosophila melanogaster	Eukaryote	180.00	13,601	7,576	56%	Adam et al.	Science 287:2185-2195 (2000)
Homo sapiens	Eukaryote	3289.00	約30,000	*****	**%	International Human Genome Sequencing Consortium	Nature 409:860-921 (2001)

（ゲノムサイズ昇順）　ORF数および機能不明ORF数は配列決定当時の値を使っています。