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An important goal of contemporary neuroscience research is to define the neural circuits and synaptic interactions that mediate behavior. In both mammals and Drosophila, the neuronal circuitry controlling circadian behavior has been the subject of intensive investigation, but roles for glial cells in the networks controlling rhythmic behavior have only begun to be defined in recent studies.Here, we...
The Drosophila circadian oscillator consists of interlocked period (per)/timeless (tim) and Clock (Clk) transcriptional/translational feedback loops. Within these feedback loops, CLK and CYCLE (CYC) activate per and tim transcription at the same time as they repress Clk transcription, thus controlling the opposite cycling phases of these transcripts. CLK-CYC directly bind E box elements to activate...
In the Drosophila circadian clock, daily cycles in the RNA levels of dclock (dClk) are antiphase to those of period (per). We altered the timing/levels of dClk expression by generating transgenic flies whereby per circadian regulatory sequences were used to drive rhythmic transcription of dClk. The results indicate that posttranscriptional mechanisms make substantial contributions to the temporal...
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