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Published March 28, 1969 | public
Journal Article

Vegetative lambda DNA:IV. Fractionation of Replicating Lambda DNA on Benzoylated-naphthoylated DEAE Cellulose

Abstract

Fractionation on a column of benzoylated-naphthoylated DEAE cellulose has been used successfully to separate pulse-labeled, replicating bacteriophage lambda DNA from completed phage DNA or completed ring DNA molecules. Sedimentation analysis of the heterogeneous replicating DNA in neutral and alkaline gradients indicates the presence of closed single-strand rings and of linear DNA strands ranging in length from smaller than to not quite twice that of the viral DNA strands. A model of DNA replication is presented which can, by the timely interaction of specific nuclease or polynucleotide ligase enzymes, account for the various DNA forms encountered.

Additional Information

© 1969 Elsevier Ltd. Received 14 September 1968, Revised 13 December 1968. We thank Miss Patricia Ilg for competent assistance during the early stages of this work and for performing the experiment recorded in Fig. 2. We acknowledge many long and useful discussions with J. W. Sedat and J. S. Parkinson. This research has been supported in part by grant GM 13554 from the U.S. Public Health Service.

Additional details

Created:
August 19, 2023
Modified:
October 18, 2023