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E.coli核苷酸切除修复过程中，UvrB的作用是

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E.coli核苷酸切除修复过程中，UvrB的作用是

A.识别损伤部位

B.解旋双链

C.3ˊ末端内切

D.5ˊ末端内切

参考答案:

答案：解旋双链；3ˊ末端内切

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