他们在使烟草细胞接触锌指核酸酶之外，也添加了可增强抗除草剂特性的基因片段。

When they exposed tobacco cells to the zinc finger nucleases, they also added a version of that gene that enhances herbicide resistance.

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通常附着在核酸酶上的锌指，称作ZFNs，它负责切断dna的两条链。

Zinc fingers are usually attached to enzymes called nucleases, dubbed ZFNs, which cut both strands of DNA.

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他还补充说锌指核酸酶可能对一些基因具有不可预知的作用。

He adds that the zinc finger nucleases could have unpredictable effects on several genes.

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