Abstract
Enzymatic synthesis of DNA from the simian virus 40 origin of DNA replication has been reconstituted in vitro with eight purified components. DNA polymerase alpha-primase complex first initiates DNA synthesis at the replication origin and continues as the lagging strand polymerase. Subsequently, the DNA polymerase delta complex initiates replication on the leading strand template. Some prokaryotic DNA polymerase complexes can replace the eukaryotic polymerase delta complex. A model for polymerase switching during initiation of DNA replication is presented.
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