THE CYCLIC HELIX AND CYCLIC COIL FORMS OF POLYOMA VIRAL DNA

Abstract
The results obtained in this study show that polyoma viral DNA contains linear and cyclic helical molecules. The double-stranded cyclic helix denatures in alkaline solutions to form a double- stranded cyclic coil, a new type of coiled molecule in which all of the turns originally present in the helix are conserved.

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