DNA Polymerases Divide the Labor of Genome Replication.

Abstract excerpt

DNA polymerases synthesize DNA in only one direction, but large genomes require RNA priming and bidirectional replication from internal origins. We review here the physical, chemical, and evolutionary constraints underlying these requirements. We then consider the roles of the major eukaryotic replicases, DNA polymerases α, δ, and ɛ, in replicating the nuclear genome. Pol α has long been known to extend RNA...

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