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Fig. 5 Phase shifts of Cry expression under various light conditions. The peak time (acrophase) obtained from the fitted curve by the cosinor fitting is plotted against the time elapsed from the beginning of the light period (panel a, sunrise-fitting plot), the middle of the night (panel b, midnight-fitting plot), and the beginning of the dark period (panel c, sunset-fitting plot). The morning peak of zCry1ab is indicated as yellow open squares, and the evening peak is shown using yellow closed squares. Blue/dark bars indicate light conditions and gray bars indicate the subjective night period. LD, long-day; SD, short-day; DD after LD, constant dark just after the long-day entrainment (LD-DD in the text); DD after SD, constant dark just after the short-day entrainment (SD-DD in the text)