نتایج جستجو برای: clock

تعداد نتایج: 47430  

Journal: :Current Biology 2007
Jason P. DeBruyne David R. Weaver Steven M. Reppert

In mammals, the circadian system is hierarchical — a brain pacemaker located within the suprachiasmatic nucleus (SCN) is responsible for regulating locomotor activity rhythms and for synchronizing peripheral oscillators [1,2]. Recent genetic evidence in mice indicates that the bHLH transcription factors CLOCK and NPAS2 have partially redundant functions within the SCN [3,4]. To further examine ...

Journal: :Cell 2003
Jie Zhao Valerie L Kilman Kevin P Keegan Ying Peng Patrick Emery Michael Rosbash Ravi Allada

Circadian rhythms of behavior, physiology, and gene expression are present in diverse tissues and organisms. The function of the transcriptional activator, Clock, is necessary in both Drosophila and mammals for the expression of many core clock components. We demonstrate in Drosophila that Clock misexpression in nai;ve brain regions induces circadian gene expression. This includes major compone...

1999
Ian Brynjolfson Zeljko Zilic

Clock management circuits are relatively new FPGA architectural blocks that are critical to solving clock distribution problems associated with high-speed, high-density designs. We outline the use of three FPGA clock managers in a variety of applications, and consider their application to low-power systems which adjust clock rates based on the amount of computation needed. Dynamic clock managem...

Journal: :Nature Reviews Molecular Cell Biology 2009

Journal: :Proceedings of the National Academy of Sciences 1930

Journal: :Physical Review Letters 2001

Journal: :Scientific American 1907

Journal: :Nature Structural & Molecular Biology 2014

Journal: :PLoS Biology 2004
R. Daniel Rudic Peter McNamara Anne-Maria Curtis Raymond C Boston Satchidananda Panda John B Hogenesch Garret A FitzGerald

Circadian timing is generated through a unique series of autoregulatory interactions termed the molecular clock. Behavioral rhythms subject to the molecular clock are well characterized. We demonstrate a role for Bmal1 and Clock in the regulation of glucose homeostasis. Inactivation of the known clock components Bmal1 (Mop3) and Clock suppress the diurnal variation in glucose and triglycerides....

2017
Mareike Selcho Carola Millán Angelina Palacios-Muñoz Franziska Ruf Lilian Ubillo Jiangtian Chen Gregor Bergmann Chihiro Ito Valeria Silva Christian Wegener John Ewer

Animal circadian clocks consist of central and peripheral pacemakers, which are coordinated to produce daily rhythms in physiology and behaviour. Despite its importance for optimal performance and health, the mechanism of clock coordination is poorly understood. Here we dissect the pathway through which the circadian clock of Drosophila imposes daily rhythmicity to the pattern of adult emergenc...

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