In mammals, the controlling clock component that generates a 24-hour rhythm is the suprachiasmatic nucleus (SCN), located in a part of the brain called the hypothalamus. The SCN produces a signal that can keep the rest of the body on an approximately 24-hour schedule. This animation illustrates...
This animation shows the molecular interactions involved in the negative feedback loop responsible for circadian rhythms in mammals.
This animation series shows four experiments that compare the activity patterns of a wild-type fly keeping a normal schedule with those of a mutant fly apparently following a 19-hour internal clock.
Watch these animations display the dynamic orchestration of the molecular events of the Drosophila biological clock.