Table 1.

Data set characteristics At Arabidopsis thaliana, Ce Caenorhabditis elegans, Dm Drosophila melanogaster, Os Oryza sativa.

Genome	Sequence	Genes	GC	Single-exon Genes	Mean Exon	Mean Intron
At	1.89 Mb	631	37.3%	19.8%	230 bp	157 bp
Ce	3.02 Mb	626	36.1%	2.2%	220 bp	334 bp
Dm	3.66 Mb	602	43.6%	24.9%	394 bp	948 bp
Os	1.55 Mb	424	44.5%	22.9%	237 bp	350 bp