SLEEP - Researchers identify gene that helps fruit flies go to sleep

In a series of experiments sparked by fruit flies that couldn't sleep, Johns Hopkins researchers say they have identified a mutant gene—dubbed "Wide Awake"—that sabotages how the biological clock sets the timing for sleep. The finding also led them to the protein made by a normal copy of the gene that promotes sleep early in the night and properly regulates sleep cycles ...

http://medicalxpress.com/news/2014-03-gene-fruit-flies.htm