“…However, determination and characterization of smaller, less complex genomes, notably bacteria and yeast, has preceded that of the human genome, providing a testing ground for high-throughout screening procedures. For example, the Saccharomyces cerevisiae genome project, which delivered the first complete eukaryotic genome with 16 chromosomes and about 6200 genes (7), provides a model for ways in which DNA sequence information can be used to direct the subsequent systematic study of biochemical and functional processes (2,3). Furthermore, new approaches are being developed for extracting information concerning gene expression, protein levels, subcellular localization and AstraZeneca, Alderley Park, Macclesfield, Cheshire SK10 4TC, UK.…”