doi: 10.1111/j.1432-1033.1979.tb13237.x.
Isolation of plasmid-protein complexes from Escherichia coli
- PMID: 385318
- DOI: 10.1111/j.1432-1033.1979.tb13237.x
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Isolation of plasmid-protein complexes from Escherichia coli
Eur J Biochem.
.
Free article
Abstract
A procedure is described for the isolation of complexes between pMB9 plasmids and protein from Escherichia coli which are stable during centrifugation on sucrose gradients and are not destroyed in the presence of competitor DNA. The proteins in these complexes have been analysed by dodecyl sulphate/polyacrylamide gel electrophoresis. Only 10 polypeptide species are found in significant quantities, many of which are bound to both the plasmid and host DNA. We have also detected the presence of one protein which binds to a specific DNA sequence inserted in the plasmid.
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