Table 1

List of genomic properties that display power-law behavior and the associated exponent (b) for the best-fitting power-law function

Exponent b

Organism

6-10-mers

Protein families

Protein super-families

Protein folds

Pseudomotifs

Pseudogene families

Functions per protein fold

Interactions per protein fold

Transcripts per protein family

Mycoplasma genitalium

3.7

1.7

1.6

1.9

-

-

-

-

-

Mycoplasma pneumoniae

3.5

1.6

1.5

1.8

-

-

-

-

-

Rickettsia prowazekii

3.7

1.7

1.6

1.9

-

-

-

-

-

Chlamydia trachomatis

3.7

1.7

1.6

1.9

-

-

-

-

-

Treponema pallidum

3.4

1.6

1.5

1.7

-

-

-

-

-

Chlamydia pneumoniae

3.6

1.6

1.5

1.7

-

-

-

-

-

Aquifex aeolicus

3.8

1.7

1.5

1.9

-

-

-

-

-

Helicobacter pylori

3.5

1.6

1.5

1.7

-

-

-

-

-

Haemophilus influenzae

3.4

1.5

1.4

1.6

-

-

-

-

-

Methanococcus jannaschii

3.5

1.6

1.5

1.7

-

-

-

-

-

Methanococcus thermoautotrophicum

3.8

2.0

1.8

2.2

-

-

-

-

-

Pyrococcus horikoshii

3.9

1.9

1.7

2.0

-

-

-

-

-

Archaeoglobus fulgidus

3.8

1.8

1.6

1.9

-

-

-

-

-

Synechocystis sp.

3.4

1.6

1.5

1.7

-

-

-

-

-

Mycobacterium tuberculosis

3.4

1.5

1.4

1.6

-

-

-

-

-

Bacillus subtilis

3.3

1.4

1.3

1.5

-

-

-

-

-

Escherichia coli

3.2

1.5

1.4

1.6

-

-

-

-

-

Saccharomyces cerevisiae

3.2

1.4

1.3

1.5

0.9

1.5

1.6

2.2

1.2

Caenorhabditis elegans

3.1

1.1

1.0

1.2

1.0

1.8

-

-

Drosophila melanogaster

3.3

1.2

1.1

1.3

1.2

-

-

-

Human chromosomes 21 and 22

-

-

-

-

1.0

1.9

-

-

Luscombe et al. Genome Biology 2002 3:research0040.1   doi:10.1186/gb-2002-3-8-research0040