据推测跑在最前边的是cccDNA（共价闭合环）,中间的是OC（开环）,最后的有点拖带,稍宽,早期多认为是线状的,但后来专家认为断链质粒发生几率很低,形不成条带,因此现在一般认为...
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短语
共价闭合环状DNA
CCCDNA
;
Covalently Closed Circular DNA
;
virus covalently closed circular dna
共价闭合环状DN
CCC DN
共价闭合环状
covalently closed circular
成共价闭合环状DNA
Covingently Closed Circular DNA