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sono craige moore

Endogenous circadian rhythmicity is a property common to many organisms, from fungi to animals. Although there is some variability, the operation of the biological clocks of the various species is done through a mechanism well conserved throughout evolution. Therefore, the study of animals which are phylogenetically distant from man, such as the fruit fly (Drosophila), has been valuable for identifying the genes and proteins constituting the cellular oscillator.