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Circadian regulation of [Mg2+]i and feedback to the clockwork. Circadian [Mg2+]i oscillations are generated by dynamic membrane transport, tuned by the cellular clock. [Mg2+]i rhythms have direct consequences for cellular energy consumption and metabolic rates. Rhythmic sunlight, [Mg2+]i and metabolism all directly feed back to entrain the clock. Similar models can be drawn for biological rhythms of other period lengths (Figure 105 created by LMB Visual Aids).
