A copy of this work was available on the public web and has been preserved in the Wayback Machine. The capture dates from 2020; you can also visit the original URL.
The file type is application/pdf
.
Treponema pallidum (Nichols strain) in tissue cultures: cellular attachment, entry, and survival
1975
Infection and Immunity
The existence of plasmids in all four types of colony morphology of Neisseria gonorrhoeae has been established by electron microscopy of the plasmid deoxyribonucleic acid (DNA) fractions separated by density equilibrium centrifugation on ethidium bromide-cesium chloride solutions. Cells of each colony type (Ti, T2, T3, and T4) were lysed with detergent, and most of the chromosomal DNA was removed by centrifugation and alkali denaturation. A simplified procedure avoiding the latter has also been
doi:10.1128/iai.11.5.1141-1146.1975
fatcat:qvh7miwpu5fdzmimutqquinny4