Izbicka, E Effects of cationic porphyrins as G-quadruplex interactive agents in human tumor cells. [electronic resource] - Cancer research Feb 1999 - 639-44 p. digital Publication Type: Journal Article; Research Support, U.S. Gov't, P.H.S. ISSN: 0008-5472 Subjects--Topical Terms: Antineoplastic Agents--pharmacologyBreast Neoplasms--drug therapyCationsCell Nucleus--metabolismDNA--drug effectsDNA, Neoplasm--drug effectsEnzyme Inhibitors--pharmacologyFemaleFibroblasts--drug effectsG-QuadruplexesHeLa CellsHumansModels, MolecularNeoplasms--drug therapyPorphyrins--pharmacokineticsTelomerase--antagonists & inhibitorsTumor Cells, Cultured