TY  - GEN
AU  - Clewell,D B
AU  - Helinski,D R
TI  - Supercoiled circular DNA-protein complex in Escherichia coli: purification and induced conversion to an opern circular DNA form
SN  - 0027-8424
PY  - 1969///0909
KW  - Centrifugation, Density Gradient
KW  - DNA, Bacterial
KW  - isolation & purification
KW  - Detergents
KW  - Escherichia coli
KW  - Hot Temperature
KW  - Methods
KW  - Microscopy, Electron
KW  - Peptide Hydrolases
KW  - Phosphorus Isotopes
KW  - Sulfates
KW  - Trypsin
KW  - Ultracentrifugation
N1  - Publication Type: Journal Article
UR  - https://doi.org/10.1073/pnas.62.4.1159
ER  -