Comparison of circadian and ultradian rhythms.

: circadian rhythm, : area of circadian component (a.u: arbitrary unit), : area of ultradian component (a.u), : ratio of ultradian to circadian component. Values are shown as mean ± SEM.*indicates the significant difference from WT mice (Dunnett’s multiple comparison, pBmal1−/− mice were excluded from the group comparison of due to the extinction of the circadian rhythm (refer to Results).