In transcription-coupled nucleotide excision repair (TC-NER), just like in global genome nucleotide excision repair (GG-NER), the cleavage of the damaged strand of DNA 5' to the site of damage occurs at the junction of single-stranded DNA and double-stranded DNA that is formed when the DNA duplex is unwound. The 5' incision is carried out by ERCC1:XPF (ERCC1:ERCC4) complex and precedes the 3' incision by ERCC5 (XPG) (Staresincic et al. 2009).
Staresincic, L, Fagbemi, AF, Enzlin, JH, Gourdin, AM, Wijgers, N, Dunand-Sauthier, I, Giglia-Mari, G, Clarkson, SG, Vermeulen, W, Schärer, OD
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