carotenoid

Lutein is one that's a bright yellow. And lycopene is the carotenoid that makes tomatoes red.

叶黄素就是其中一种鲜明的黄色，而番茄红素是一种使得西红柿变红的类胡萝卜素。

Stephen believes that is because the fruits and vegetables upped the subjects' carotenoid levels and added more golden tones to their skin.

斯蒂芬认为这是由于水果和蔬菜补充了参加实验者的类胡萝卜素的含量，给他们的皮肤增加了更多的金色调。

These structural changes on the protein's surface kick off a cascade of events that affect the expression of genes, such as those that turn carotenoid production on and off.

这一蛋白质表面的结构改变产生了一系列能够影响基因表现的东西，比如打开或者关闭类胡萝卜素的生产。