Iditarod Sled Dog Race Cell Volume 148, Issue 5, (March 2012)

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Iditarod Sled Dog Race Cell Volume 148, Issue 5, (March 2012)   Cell  Volume 148, Issue 5, (March 2012) DOI: 10.1016/j.cell.2012.02.033 Copyright © 2012 Terms and Conditions

Alaskan sled dogs posses their own unique genetic signature, but they also contain large fragments of chromosomes derived from officially recognized purebreds. Modified from Huson et al. (2010)/Creative Commons Attribution License. Cell 2012 148, DOI: (10.1016/j.cell.2012.02.033) Copyright © 2012 Terms and Conditions

Could genetic variations in the PPARδ-signaling pathway contribute to the extreme endurance of Alaskan sled dogs? Photo taken at the ceremonial start of the Iditarod in 2010 by Frank Kovalchek/Creative Commons Attribution 2.0. Cell 2012 148, DOI: (10.1016/j.cell.2012.02.033) Copyright © 2012 Terms and Conditions

An electroencephalography (EEG) easily differentiates between awake and sleeping (top). Vyazorvskiy et al. implanted electrodes in the rat cortex to measure voltage signals similar to an EEG in small regions of the brain (bottom). Modified from Colwell, C.S. (2011). Nature 472, 427–428. Cell 2012 148, DOI: (10.1016/j.cell.2012.02.033) Copyright © 2012 Terms and Conditions