Proteins in the Neurospora Circadian Clockworks

We, and every other organism in the solar system, live in a profoundly rhythmic environment. The frequencies of these environmental cycles on Earth range from minutes to years, but for most organisms the dominant periodicity is that of the earth's rotation. A wide variety of organisms, including most eukaryotes and nearly all higher organisms, express circadian biological clocks that enable them to anticipate this particular environmental rhythmicity, and the output of these clocks are circadian rhythms.