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. 2020 Oct 2;12(10):2848. doi: 10.3390/cancers12102848

Figure 4.

Figure 4

Mono- and polyubiquitination of proliferating cell nuclear antigen (PCNA) tightly regulates the initiation of translesion synthesis and template switching. In humans, PCNA is monoubiquitinated by the Rad6/Rad18 complex and can be subsequently polyubiquitinated by the Ubc13/Mms2/HLTF complex.