They're sometimes called transcription factors and this is an example of a transcription factor that is itself activated or turned on by the presence of a steroid.

它们被称为转录因子,转录因子的一个例子就是,能够自激活或被激素激活

耶鲁公开课 - 生物医学工程探索课程节选

Steroid hormones can operate in a different way because of their structure.

类固醇类激素的作用原理有所不同,这主要是因为它们的结构与蛋白质不同

耶鲁公开课 - 生物医学工程探索课程节选