title: Photoreaction of psoralen derivatives with structurally organized DNA.
mesh_terms: D000818:Animals; D002417:Cattle; D002843:Chromatin / Q000528:radiation effects; D004247:DNA / Q000528:radiation effects*; D011564:Furocoumarins; D009707:Nucleosomes / Q000528:radiation effects; D013950:Thymus Gland / Q000528:radiation effects; D014466:Ultraviolet Rays
chemical_list: D002843:Chromatin; D011564:Furocoumarins; D009707:Nucleosomes; D004247:DNA