Fig. 6: Mechanism of PARP1-mediated DPC resolution.

A Illustration of PARP1-mediated targeting of TOP1cc-like lesions. B In the absence of repair (e.g., PARPi) TOP1cc-like lesions encountered on the leading strand template induce CMG run-off. C Unrepaired TOP1cc-like lesions encountered on the lagging strand template induce CMG disassembly.