Document Detail

Intracellular location of small circular DNA complexes in mammalian cell lines.
MedLine Citation:
PMID:  6657776     Owner:  NLM     Status:  MEDLINE    
For determination of the cellular location of small polydisperse circular DNA complexes, rat myoblastic L6 cells, HeLa cells, and mouse L cells were enucleated and processed by the micapress-adsorption method for electron microscopy (H. Yamagishi, T. Kunisada, and T. Tsuda, 1982, Plasmid 8, 299-306). Small circular DNA complexes from intact cells showed a heterogeneous size distribution of from 0.1 to more than 2 micron with a mean contour length of 0.6 to 0.8 micron, like that of covalently closed circular DNAs. Cells contained 400 to 1200 copies. The size distribution in the cytoplasts was narrow and the number-average length was 0.3 to 0.4 micron, whereas that in L6 karyoplasts was wide and the average length was 0.9 micron. The longer circular complexes appeared to be absent from the cytoplasts. The origin and biological functions of these complexes are discussed in relation to the cellular locations of the complexes.
T Kunisada; H Yamagishi; T Sekiguchi
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Plasmid     Volume:  10     ISSN:  0147-619X     ISO Abbreviation:  Plasmid     Publication Date:  1983 Nov 
Date Detail:
Created Date:  1984-02-14     Completed Date:  1984-02-14     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  7802221     Medline TA:  Plasmid     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  242-50     Citation Subset:  IM    
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MeSH Terms
Cell Compartmentation
Cell Line
DNA, Circular / analysis*
Extrachromosomal Inheritance*
Hela Cells / ultrastructure
L Cells (Cell Line)
Microscopy, Electron
Reg. No./Substance:
0/DNA, Circular

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