11. The SMC proteins (for structural maintenance of chromosomes) include cohesins and condensins, and are known to have all of the following properties EXCEPT:
(A) a complete ATP binding site
(B) a hinge region
(C) topoisomerase activity to produce positive supercoils
(D) the ability to condense DNA
(E) two coiled-coil domain.

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統計： A(1), B(0), C(0), D(0), E(1) #2789331

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(C) topoisomerase ac...
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