磷脂酸(phosphatidicacid, PA)是植物中重要的细胞内信号分子，被称为“脂质第二信使”，特别是几个PA的作用靶点已被克隆和鉴定。

Phosphatidic acid (PA) is an important intracellular signal molecule and is called the lipid second messenger because several targets of PA have especially been cloned and identified.

youdao

They often involve the generation of what are called 'second messenger' molecules which carry the signal further into the cell.

过程中通常会生成一种叫做,第二信使的分子,将信号更深入地传递至细胞内部

耶鲁公开课 - 生物医学工程探索课程节选

Now, one of the advantages of having second messengers is this is one way that you can integrate between different receptor systems that are acting inside a cell.

使用第二信使分子的好处在于,它能够将,作用于细胞内部不同的,受体系统结合起来

耶鲁公开课 - 生物医学工程探索课程节选

Sometimes second messengers collect signals from a variety of different receptor systems, translate them into one kind of internal change, and the cell then just has to know about that one thing changing.

第二信使分子能够收集,来自不同受体系统的信号,将它们转化为同一种细胞内在的变化,这样细胞就只需对一种变化作出反应

耶鲁公开课 - 生物医学工程探索课程节选