Induction of ectopic sense organs by the Drosophila PiP5K, an essential gene expressed in nervous system precursors during embryonic and larval development. - Hassan, B.; Prokopenko, S.; Breuer, S.; Paululat, A. (Abstracts of papers presented at the 1997 Cold Spring Harbor meeting on neurobiology of Drosophila: September 24-September 28, 1997., 1997)