These proteins have functions that are essential for life of the cell, they transport molecules back and forth across the membrane.

这些蛋白所起的功能,对于细胞生存至关重要,它们负责转运分子通过细胞膜进出细胞

耶鲁公开课 - 生物医学工程探索课程节选

Only certain genes are being expressed and it's the family of genes that are being expressed in a cell, likewise the family that are not being expressed, that determines what a cell is like, how it functions.

只有某些特定的基因在细胞中表达,那些在细胞中表达的基因,与那些没有表达的基因,共同决定了细胞的形态和功能

耶鲁公开课 - 生物医学工程探索课程节选