stem-cells：干細胞(存儲版)
【正文】 re a class of protein. ? The job of an enzyme is to catalyze a reaction (help it get started). 第一頁，共十六頁。 How do enzymes work? ? The material that an enzyme works on is called a substrate. ? Enzymes work like a lock and key – must have right enzyme for each substrate. 第九頁，共十六頁。 Usually end with “ase〞。 C
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