Clewell, D B <br/><br/>
Supercoiled circular DNA-protein complex in Escherichia coli: purification and induced conversion to an opern circular DNA form.  [electronic resource] 

 -  Proceedings of the National Academy of Sciences of the United States of America  Apr 1969 
 - 1159-66 p.  digital 
<br/><br/> Publication Type: Journal Article 
<br/><br/><label>ISSN: </label>0027-8424 
<br/><br/><label>Standard No.: </label>10.1073/pnas.62.4.1159  doi 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Centrifugation, Density Gradient<br/>DNA, Bacterial--isolation & purification<br/>Detergents<br/>Escherichia coli<br/>Hot Temperature<br/>Methods<br/>Microscopy, Electron<br/>Peptide Hydrolases<br/>Phosphorus Isotopes<br/>Sulfates<br/>Trypsin<br/>Ultracentrifugation