Isolation of Membrane-Associated Folded Chromosomes from Escherichia coli: Effect of Protein Synthesis Inhibition

Oliver A. Ryder, Douglas W. Smith
1974 Journal of Bacteriology  
The sedimentation properties of membrane-associated folded chromosomes prepared from Escherichia coli TAU-bar at 0 to 4 C were studied. Utilizing a modification of the procedure of Stonington and Pettijohn (1971) , quantitative yields of membrane-associated folded chromosomes may be obtained. Folded chromosomes remained associated with the cell envelope during their replication and after completion of residual synthesis in the absence of required amino acids, as demonstrated by sedimentation
more » ... by sedimentation velocities and the presence of high levels of cosedimenting protein. Membrane-associated folded chromosomes isolated from amino acid-starved cells sedimented more rapidly than membraneassociated folded chromosomes isolated from exponentially growing cells.
doi:10.1128/jb.120.3.1356-1363.1974 fatcat:uz3ee4zsdnfixdhnht4m5bto7m