Clock genes is prevalent in biological world, and they can bring and control biological circadian rhythm.

生物钟基因普遍存在于生物界，其作用在于产生和控制昼夜生物节律的运转。

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The clock genes were strongly expressed specifically in outer layers of the adrenal gland that are responsible for corticoid production.

时钟基因特别在肾上腺皮质激素的主要产地肾上腺的外层高度表达。

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One study may help explain why: the amount of daylight to which newborn mice are exposed sets the behavior of key biological clock genes for life.

一项研究或许可以给出解释：这些新的小生命接触日光的多少决定了身体中控制生理时钟的基因的特性。

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The Period, or "Per, " gene is one of the most important clock genes known in fruit flies and mammals.

BBC: Body clock 'set before birth'

Six of the clock genes were suppressed by the cytokine in ways that would, in an actual animal, be expected to promote sleep.

ECONOMIST: Fatigue: Killing time | The

Meanwhile the natural body clock was disturbed - some genes naturally wax and wane in activity through the day, but this effect was dulled by sleep deprivation.

BBC: Bad sleep 'dramatically' alters body