Table 1.

Nucleotide Frequencies (P_A, P_C, P_G and P_T) and GC bias (S_G) for Representative Metazoans and Plants. Note that S_G of the Complementary Strand has the Same Value but a Different Sign

Species	Accession	Length	PA	PC	PG	PT	SG
Oscarella lobularis	NC_014863	20260	0.333	0.176	0.173	0.318	-0.006
Hydra oligactis	NC_010214	16314	0.348	0.114	0.124	0.414	0.039
Caenorhabditis elegans	NC_001328	13794	0.314	0.089	0.149	0.448	0.253
Schistosoma japonicum	NC_002544	14085	0.249	0.084	0.206	0.462	0.422
Drosophila melanogaster	NC_001709	19517	0.418	0.103	0.076	0.404	-0.150
Ciona intestinalis	NC_004447	14790	0.342	0.095	0.119	0.444	0.116
Branchiostoma lanceolatum	NC_001912	15076	0.269	0.159	0.214	0.358	0.148
Eptatretus burgeri	NC_002807	17168	0.328	0.229	0.106	0.337	-0.366
Mitsukurina owstoni	NC_011825	17743	0.323	0.254	0.134	0.290	-0.309
Danio rerio	NC_002333	16596	0.319	0.239	0.160	0.281	-0.198
Xenopus laevis	NC_001573	17553	0.331	0.235	0.135	0.300	-0.270
Alligator mississippiensis	NC_001922	16646	0.312	0.295	0.135	0.257	-0.371
Gallus gallus	NC_001323	16775	0.303	0.325	0.135	0.238	-0.412
Mus musculus	NC_005089	16299	0.345	0.244	0.124	0.287	-0.328
Marchantia polymorpha	NC_001660	186609	0.285	0.210	0.214	0.291	0.009
Cycas taitungensis	NC_010303	414903	0.264	0.235	0.235	0.266	0.000
Arabidopsis thaliana	NC_001284	366924	0.279	0.225	0.222	0.273	-0.006
Oryza sativa indica	NC_007886	491515	0.279	0.219	0.220	0.283	0.002
Sorghum bicolor	NC_008360	468628	0.281	0.220	0.217	0.282	-0.008
Triticum aestivum	NC_007579	452528	0.279	0.221	0.222	0.278	0.002