Figure 5. Model of A Eukaryotic Replication Fork.
This model is based on the currently favored hypothesis that Pol ε is primarily responsible for leading strand synthesis, shown in blue, and Pol δ is primarily responsible for lagging strand synthesis, shown in green. Pol α-primase cooperates with Pol δ to conduct lagging strand synthesis, with the initiating RNA primers shown in red. RPA heterotrimers are shown in violet. The CMG replicative helicase is shown as a heterohexameric MCM complex (orange) associated with the GINS complex (green) and Cdc45 (light red).
