Conformations of the Single-Stranded DNA of Bacteriophage M13
Authors:
- 1 November 1970
- journal article
- Published by National Academy of Sciences in Proceedings of the National Academy of Sciences
- Vol. 67 (3) , 1534-1541
Abstract
At least two conformations of M13 single-stranded DNA have been demonstrated by measuring differences in sedimentation coefficient and by direct visualization in the electron microscope. Which form is obtained from infected cells and/or intact phage depends on the pH, ionic strength, and temperature. The slower-sedimenting form can be converted to the faster-sedimenting, single-stranded form by low ionic strength, alkali treatment, formamide, or formaldehyde, but not by exposure to 100 degrees C in 1.0 M NaCl. The ability to assume either conformation appears to be a function of the nucleic acid alone. Whether or not these different conformations are of biological significance is still unknown.Keywords
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