1. Berkeley Drosophila Genome Project, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA.
2. Berkeley Drosophila Genome Project, Department of Molecular and Cell Biology, University of California, Berkeley, CA 94720, USA.
3. Human Genome Sequencing Center, Baylor College of Medicine, Houston, TX 77030, USA.
4. Department of Cancer Genetics, Roswell Park Cancer Institute, Buffalo, NY 14263, USA.