Single-strand breaks can lead to complex configurations of plasmid DNA in vitro.
Single-strand breaks can lead to complex configurations of plasmid DNA in vitro.
复制标题
单链断裂可导致质粒 DNA 在体外形成复杂的构型。
DOI:
--
复制
发表时间:
1987
期刊:
影响因子:
--
通讯作者:
C. Herskind
中科院分区:
文献类型:
--
作者:
C. Herskind
DNA species which migrate extremely slowly in agarose gel electrophoresis may be formed from plasmid DNA containing radiation-induced single-strand breaks (ssbs). Postirradiation heat treatment in low ionic strength buffer and subsequent incubation with Mg2+ strongly enhanced the formation of these species. Electron micrographs taken after such treatment show numerous complex configurations containing DNA material from several plasmid molecules. Less extreme formation of slowly migrating DNA occurred without postirradiation heat treatment or Mg2+ incubation when the DNA was co-precipitated with calcium phosphate in a physiologically balanced buffer and incubated under conditions used for DNA-mediated gene transfer. The data suggest that homologous pairing between single-stranded regions formed in relation to ssbs may contribute to cohesion between different molecules. The significance of the cohesion process for gene transfer experiments and cellular radiation effects is discussed.
DOI:
10.1016/0167-8817(85)90063-x
发表时间:
1985
期刊:
Mutation research
影响因子:
--
作者:
Moran,E;Wallace,SS
通讯作者:
Wallace,SS
DOI:
10.1016/0006-291x(83)91191-9
发表时间:
1983
影响因子:
3.1
作者:
Wang,ML;Lee,AS
通讯作者:
Lee,AS