摘要
透射电子显微镜研究表明，质粒ｐＢＲ３２２ ＤＮＡ 分子中有一种特殊的拓扑结构因子，这种拓扑结构因子能阻止超螺旋扭力在整个分子内的传递．细胞内的巨大染色体ＤＮＡ
Evidences by electron microscopy suggest that a special topologically knotting factor in plasmid DNA can restrict the transmission of supercoiling tension along DNA duplex. The knotting partitions DNA molecules into some of smaller loops. The biological function of the knotting was discussed.
出处
《南开大学学报（自然科学版）》
CAS
CSCD
北大核心
1999年第3期155-157,200,共4页
Acta Scientiarum Naturalium Universitatis Nankaiensis
