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The KaiABC circadian clock in the cyanobacterium Synechococcus elongatus can be reconstituted in vitro from three proteins in the presence of ATP. This oscillator displays the pertinent features of circadian rhythms including a self-sustained 24-h period and temperature compensation. At every phase of the cycle there is a mixture of types of Kai complexes and the proportions of the various types are...
The term ‘stacking’ is normally associated with $$\pi \mbox{ - }\pi $$ interactions between aromatic moieties. The parallel alignment between adjacent DNA bases arguably constitutes the best-known example and provides the dominating contribution to the overall stability of DNA duplexes. Beyond canonical $$\pi \mbox{ - }\pi $$ interactions, a preliminary inspection of crystal structures...
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