Molecular mapping of deletion breakpoints on chromosome<Emphasis Type="Italic"> 4</Emphasis> of <Emphasis Type="Italic">Drosophila melanogaster</Emphasis>
(1) Department of Biological Sciences, University of Alberta, Edmonton, AB, Canada, T6G 2E9;(2) Department of Developmental and Cell Biology, University of California, Irvine, Irvine, CA 92697, USA