这是一系列尤其容易被基质金属蛋白酶切断的氨基酸(蛋白质的基石)序列。
This is a sequence of amino acids (the building blocks of proteins) that is particularly vulnerable to the cutting action of MMPs.
这些酶被用来把特定的DNA序列中的原生质切断，切断后的原生质可以被科学家们自由地重新连接。
These enzymes are used to"snip apart" plasmids at very specific DNA sequences, leaving free ends that can be rejoined as the scientist chooses.
现在科学家们已经发现了许多种限制酶。它们在碱基对的不同序列中切断DNA。
Many different types are now available, each cutting DNA at a different sequence of base pairs.
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