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Adv Exp Med Biol. 1984;179:127-41.

Chromatin structure and DNA replication.


The structure of (3H) thymidine pulse labeled, replicating chromatin differs from that of non replicating chromatin by several operational criteria which are related to the higher nuclease sensitivity of replicating chromatin. We summarize the structural changes that we observe using replicating chromatin as substrate for micrococcal nuclease. The data suggest a more extended configuration of replicating compared to non replicating chromatin. We use these data to discuss a model of the chromatin structure in the vicinity of replication forks. Finally, we present data to show that the reversion of structural changes in replicative chromatin depends on continued DNA replication.

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