Department of Biology, Howard Hughes Medical Institute, Brandeis University, Waltham, MA, USA.
Angew Chem Int Ed Engl. 2021 Apr 12;60(16):8650-8666. doi: 10.1002/anie.202015199. Epub 2021 Feb 26.
Circadian rhythms are present in most if not all animals, plants, and even photosynthetic cyanobacteria. These cyanobacterial clocks as well as plant clocks are very different from those of animals, with no credible homology between the different clock proteins. Therefore circadian rhythms probably emerged multiple times in evolution, which underscores their importance.
昼夜节律存在于大多数（如果不是全部的话）动物、植物，甚至光合蓝细菌中。这些蓝细菌钟和植物钟与动物钟有很大的不同，不同时钟蛋白之间没有可信的同源性。因此，昼夜节律可能在进化过程中多次出现，这突出了它们的重要性。
