有些人睡眠少身体棒？原来是基因决定的_BEC初级作文

有些人睡眠少身体棒？原来是基因决定的

白天时间不够用，晚上睡眠不好？但现实生活中，确实有些人每天睡眠时间很短，却精神饱满。为什么有些人每天只需要睡4、5个小时？这其实是由基因决定的。

A genetic mutation that allows people to feel fully rested with fewer than six hours sleep a night has been identified by studying a family who get by on less than average. It is the second such finding in recent months.

科学家通过对一个家庭的研究，发现了一种可以使人在每晚睡眠不足6小时的情况下得到充分休息的基因突变。这个家庭的成员每日睡眠时长低于平均水平。这是近几个月来第二个针对这一问题的同类发现。

有些人睡眠少身体棒？原来是基因决定的1

Ying-Hui Fu at the University of California, San Francisco, and her colleagues have been seeking out and studying families in which some people seem to need less sleep than normal. They have been looking for the gene variants that might be responsible, and genetically engineering these variants into mice to confirm their effect.

加州大学旧金山分校的傅嫈惠和她的同事们一直在寻找和研究那些所需睡眠少于平均水平的家庭。他们一直在寻找可能起作用的基因变异，并通过基因技术将这些变异的基因植入老鼠体内以证实其作用。

Her team has found several mutations make people need less sleep. In August, Fu’s team reported that a mutation in a gene called ADRB1 allows 12 members of a family to sleep as little as 4.5 hours per night without feeling tired. This gene codes for a receptor protein common in a brain region called the dorsal pons, known to regulate sleep.