When they receive the signal they make - they change in a very specific way and the cell can recognize this change that's occurred at the cell surface.

当它们接收到信号之后,就会发生十分特殊的变化,细胞能够识别自身表面发生的这种变化

耶鲁公开课 - 生物医学工程探索课程节选

We've learned how to identify and catalog cells according to the composition of proteins on the surface and those proteins that distinguish a cell are often called marker proteins.

我们学会了如何按照表面的蛋白成分,来识别并分类细胞,而这些用来区别细胞的蛋白,通常称为标记蛋白

耶鲁公开课 - 生物医学工程探索课程节选

Well, the way that your immune system recognizes it is that all the cells of our body express a molecule on their surface, a membrane protein called the MHC1 complex.

而免疫系统识别的方法是,身体内所有细胞在其表面表达一种分子,一种叫做MHC1复合体的膜蛋白

耶鲁公开课 - 生物医学工程探索课程节选