Analysis of 1.9 Mb of contiguous sequence from chromosome 4 of Arabidopsis thaliana

It has been possible to use the yeast artificial chromosome-based physical map of chromosome 4 to construct a sequence-ready map of cosmid and bacterial artificial chromosome clones covering a 1.9-megabase (Mb) contiguous region of the plant Arabidopsis thaliana. A region between markers COP9 and G3845 on the long arm of chromosome 4 from the ecotype Columbia was chosen for sequencing. It was found that there is a consistently high gene density over an extended contiguous region, with 389 predicted genes in 1.87 Mb.