Department of Biochemistry and Molecular Biology, The Pennsylvania State University, University Park, PA 16802, USA. rch8@psu.edu
A 'working draft' of the human genome sequence is now available. Comparisons with the sequences of mouse and other species will be a powerful approach to identifying functional segments of the noncoding regions, such as gene regulatory elements. However, the choice of a species for most effective comparison differs among various loci.