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Chloroplast DNA from higher plants replicates by both the Cairns and the rolling circle mechanism

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Abstract

The chloroplast DNA (ctDNA) from pea and corn plants contains both Cairns type and rolling circle replicative intermediates. Denaturation mapping studies with pea ctDNA molecules have shown that the rolling circles initiate replication at or near the site where the Cairns replicative intermediates terminate replication. These results suggest that the rolling circles are initiated by a Cairns round of replication. A model for the replication of the chloroplast DNA is based on these results.

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