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Fig. 1

Fig. 1. Models for DNA replication. From: The bacterial replisome: back on track?.

A. Tracking replisomes. Two independent replisomes (green) track along a rosette-shaped parental chromosome (black lines), leaving two nascent daughter duplexes (red lines).
B. Spooling replisomes. Replisomes remain within a central replication zone (hatched region), as parental DNA is threaded through replication zone (black arrows) and daughter duplexes are ejected outward (red arrows).

David Bates. Mol Microbiol. ;69(6):1341-1348.
Fig. 2

Fig. 2. Two configurations for spooling replisomes. From: The bacterial replisome: back on track?.

A. Tail-to-tail replisomes. Helicases (green) are oriented in opposite directions.
B. Head-to-head replisomes. Helicases are positioned near each other. Pol III core (red) and B clamp (brown) are shown. Lagging strand is denoted by looped portion. Arrows indicate motion of DNA (grey) relative to fixed replisomes. Drawing is not to scale, and is highly schematic. See text for details.

David Bates. Mol Microbiol. ;69(6):1341-1348.

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