title: PARP around the clock.
abstract: Cells possess internal ∼24 hr or circadian clocks that synchronize physiological processes with daily cycles of light and nutrient availability. In this issue, Asher et al. (2010) find that PARP-1 (poly(ADP-ribose) polymerase 1) modifies components of the clock machinery in response to feeding, providing a mechanism for how metabolic rhythms coordinate with circadian rhythms.
authors.affiliation: Department of Neuroscience, Howard Hughes Medical Institute, University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, NA4.118, Dallas, TX 75390-9111, USA.
authors.forename: Vivek
authors.initials: V
authors.lastname: Kumar
authors.forename: Joseph S
authors.initials: JS
authors.lastname: Takahashi