DNA replication in Physarun polycephalum: electron microscopic and autoradiographic analysis of replicating DNA from defined stages of the S-period

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Abstract
Electron microscopic and autoradiographic analysis of replicating DNA from Physarum showed that replication occurs at a rate of 0.4 micron/min/per replicon and that replicons of size 10--15 mu occur in temporal clusters with an average of about 4 replicons per cluster. These results are compared with previous hydrodynamic measurements and with those obtained in other organisms.