Table 1.

	Chromosome	Date	Access. No.	Length	No. of genes b	%Exons + Introns	Reference
H. sapiens	21, contig "28"	17/4/01	NT_011512.3	28,515,322	91	16	[18]
H. sapiens	22, contig "23"	17/4/01	NT_011620.5	22,998,450	226	36	[19]
D. melanogaster	2R (Right arm)	7/11/02	NT_033778.1	20,302,755	2687c	57	[20]
C. elegans	I	23/4/99	"chr_I"	16,183,833a	2516	42.6	[21]
A. thaliana	II	21/12/99	AE002093	19,647,091	4116	41.7	[22]
S. cerevisiae	IV	16/6/02	NC_001136.2	1,531,929	856	73.8	[23]
M. jannaschii	Main	30/1/98	L7717	1,664,970	1715	87.1	[24]

^a 1,441,828 N bases excluded. ^bAs found by "ANEX" in the annotation file used. ^c Many alternatively spliced genes.