part of nucleotide-excision repair nucleotide-excision repair, preincision complex stabilization GO:0006293 The stabilization of the multiprotein complex involved in damage recognition, DNA helix unwinding, and endonucleolytic cleavage at the site of DNA damage as well as the unwound DNA. The stabilization of the protein-DNA complex ensures proper positioning of the preincision complex before the phosphodiester backbone of the damaged strand is cleaved 3' and 5' of the site of DNA damage. biological_process positive regulation of protein-containing complex assembly