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. 1985 Jan;5(1):85-92.
doi: 10.1128/mcb.5.1.85-92.1985.

Method of mapping DNA replication origins

L D Spotila, J A Huberman

Method of mapping DNA replication origins

L D Spotila et al. Mol Cell Biol. 1985 Jan.

Abstract

We have developed a method which allows determination of the direction in which replication forks move through segments of chromosomal DNA for which cloned probes are available. The method is based on the facts that DNA restriction fragments containing replication forks migrate more slowly through agarose gels than do non-fork-containing fragments and that the extent of retardation of the fork-containing fragments is a function of the extent of replication. The procedure allows the identification of DNA replication origins as sites from which replication forks diverge. In this paper we demonstrate the feasibility of this procedure, with simian virus 40 DNA as a model, and we discuss its applicability to other systems.

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