When translated into protein in a cell, it makes that cell do something—and that something is often more than just “make more of proteinX”.
如果将其移植到细胞的蛋白质之中，它可以令细胞发挥更多功能 – 不仅仅是“制造更多的蛋白质X”。
2
Substance X, in turn, donates its electron to an iron-containing protein called ferredoxin.
X物质又将它的电子转移给一种含铁的蛋白质，称为铁氧还蛋白。
3
X-ray structures of catalogs of proteins have also provided useful information on the types of protein structures, folds and domains found in nature; this is sometimes termed structural genomics.