Table III.

Comparison of Arabidopsis genome statistics

Summary statistics comparing features of the Arabidopsis genome annotation published in 2000 (Arabidopsis Genome Initiative, 2000) and the present annotation data set are shown.

Feature	October, 2000	February, 2003
Length of sequence in chromosomes 1-5 (Mb)	115.4	119.0
No. of protein-coding genes	25,498	27,384
Gene density (kb gene-1)	4.5	4.4
Average gene length (bp)	2,011	2,195
Average peptide length (residues)	434	426
Total no. of exons	132,982	155,190
Average exons per gene	5.2	5.4
Average exon size (bp)	250	276
Average intron size (bp)	168	166