Figure 4. The Nobel Prize Winners in Physiology or Medicine in 2017 “for their discoveries of molecular mechanisms controlling the circadian rhythm”. From left to right, Drs. Jeffrey C. Hall, Michael Rosbash and Michael W. Young (www.nobelprize.org).
Per gene shows high level of homology throughout many living organisms from human and mouse to even dinosaurs who lived about 700 million years ago. It reflects the importance of circadian rhythm well synchronized to natural cycle of day and night and may be the reason why it is said “Nature is a great teacher”.
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