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Published December 1975 | Published
Journal Article Open

Studies on nucleic acid reassociation kinetics: Reactivity of single-stranded tails in DNA-DNA renaturation

Abstract

The reassociation kinetics of Escherichia coli DNA were measured by S1 nuclease resistance and hydroxyapatite binding. While the reaction assayed by hydroxyapatite displays second order kinetics, the S1 nuclease measurements follow a non-second order form, as previously reported by Morrow (Ph.D. Dissertation, Stanford University, 1974). Much of the reaction measured with S1 nuclease occurs between single stranded regions of fragments already bearing duplex structures from previous collisions, and between such regions and totally free single strands. Experimental determinations indicate that the nucleation rate of single stranded regions on fragments also containing duplexes is inhibited by an average factor of 2 to 4.

Additional Information

© 1975 by the National Academy of Sciences. Contributed by Roy J. Britten, September 15, 1975. We acknowledge the expert technical assistance of Ms. Margaret Chamberlin and Ms. Denise Painchaud. We thank Drs. Norman Davidson and Lynn Klotz for their critical reviews of a draft of this paper. This research was supported by NIH Grants HD-05753 and GM-20927 and by NSF Grant GB-33441.

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August 22, 2023
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