The compositional organization and the expression of the Arabidopsis genome

The base composition patterns of genes, coding sequences and gene expression levels were analyzed in the available longs sequences (contigs) of Arabidopsis. Chromosome 5 was analyzed in detail and all chromosomes for which sequence data are now available show essentially the same large-scale compositional properties. Guanine+cytosine levels of genes and of their coding regions, as well as gene densities and expression levels, all show a marked tendency to be higher in the distal regions of. Arabidopsis chromosomes. (C) 2000 Federation of European Biochemical Societies.