title: Inhibition of DNA dependent RNA synthesis by porphyrin photosensitizers.
mesh_terms: D003432:Cross-Linking Reagents / Q000494:pharmacology; D004247:DNA / Q000378:metabolism*; D012321:DNA-Directed RNA Polymerases / Q000037:antagonists & inhibitors*; D008027:Light; D011166:Porphyrins / Q000494:pharmacology*; D013698:Templates, Genetic; D014158:Transcription, Genetic / Q000187:drug effects / Q000528:radiation effects
chemical_list: D003432:Cross-Linking Reagents; D011166:Porphyrins; D004247:DNA; D012321:DNA-Directed RNA Polymerases