The other way that they define - or find stem cells is that over the years of studying them we've begun to recognize some of the proteins, the specific proteins that are produced by these characteristic cells.

而另外一种能让研究人员定位,或者找到干细胞的方法就是,多年研究后,我们开始能识别一些蛋白,这些特定的蛋白是由,这种特殊的细胞生成的

耶鲁公开课 - 生物医学工程探索课程节选