Reference: Fangman WL, et al. (1983) ARS replication during the yeast S phase. Cell 32(3):831-8

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Abstract


A 1.45 kb circular plasmid derived from yeast chromosome IV contains the autonomous replication element called ARS1. Isotope density transfer experiments show that each plasmid molecule replicates once each S phase, with initiation depending on two genetically defined steps required for nuclear DNA replication. A density transfer experiment with synchronized cells demonstrates that the ARS1 plasmid population replicates early in the S phase. The sequences adjacent to ARS1 on chromosome IV also initiate replication early, suggesting that the ARS1 plasmid contains information which determines its time of replication. The times of replication for two other yeast chromosome sequences, ARS2 and a sequence referred to as 1OZ, indicate that the temporal order of replication is ARS1 leads to ARS2 leads to 1OZ. These experiments show directly that specific chromosome regions replicate at specific times during the yeast S phase. If ARS elements are origins of chromosome replication, then the experiment reveals times of activation for two origins.

Reference Type
Journal Article
Authors
Fangman WL, Hice RH, Chlebowicz-Sledziewska E
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