酶工程（英语：Enzyme engineering）又可以说是蛋白质工程学，利用传统突变技术或是分子生物学技术，将蛋白质上的氨基酸进行突变，已改变蛋白质之化学性质和功能。例如:在酵素的应用上，可以让原本不难热的酵素，经过酵素工程改变后，酵素可以耐热。
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