Indeed, we scientists use metaphors all the time when we communicate with one another: we speak of selfish DNA and orphan receptors and proteins that serve as chaperones and genes that hitchhike.
的确，我们科学家彼此交流时，一直都在用比喻：我们说自私的DNA，孤儿接收者，蛋白质像是伴侣，而基因像是搭车旅行。
Adam sought out gaps in the metabolism model, specifically orphan enzymes, which scientists think exist, but which haven't been linked to any parent genes.
亚当找到了新陈代谢模型的豁口，尤其是孤酵酶。科学家认为有这样的酵酶存在，但没有把它与源基因联系上。
After selecting a desirable orphan, Adam scoured the database for similar enzymes in other organisms, along with the corresponding genes.
当筛选一个满意的孤酵酶后，亚当从其它有机体中清除了类似酵酶的数据以及与之一致的基因数据。
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