Analysis of SMARCAL1 participation in nucleotide excision repair. a: Survival curve comparing the sensitivity of SIOD (N859), unaffected (C5RO), and Cockayne syndrome B (CS-B, CS188TOR) skin fibroblasts to killing by UV radiation (254 nm). This is a measure of both TC-NER and global NER. b: Survival curve comparing the sensitivity of SIOD (N859), unaffected (C5RO), and CS-B (CS163TOR) skin fibroblasts to killing by illudin-S. This is a measure of TC-NER.