Nucleotide excision repair (NER) is a versatile DNA repair pathway essential for the removal of a broad spectrum of structurally diverse DNA lesions arising from a variety of sources, including UV irradiation and environmental toxins. Although the core factors and basic stages involved in NER have been identified, the mechanisms of the NER machinery are not well understood. This review summarizes our current understanding of the mechanisms and order of assembly in the core global genome (GG-NER) pathway.

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