Figure 3.
Representative autoradiographs of denaturing gels of nucleotide excision experiments in HeLa cell extracts. (A) The substrates were either free 147-mer 601cP DNA sequences containing single 5’,8-cyclopurine lesions, or nucleosomes assembled with octamers derived from recombinant (Rec) or native, post-translationally modified histones extracted from HeLa cells. (B) Analogous NER experiments with cis- and trans-BPDE-dG adducts positioned at the same In and Out superhelical locations. Three separate gels are depicted in panels A and B.