title: Comparative phosphorescence quenching of DNA's of different composition.
abstract: Small amounts of paramagnetic cations quench the phosphorescence of DNA. Although the emission intensity is monotonic with increasing thymine content, the quenching efficiency is not. The cations quench from phosphate sites.
mesh_terms: D000818:Animals; D004247:DNA; D004578:Electron Spin Resonance Spectroscopy; D005453:Fluorescence; D049449:Luminescence; D008297:Male; D008670:Metals / Q000494:pharmacology; D008837:Micrococcus; D011119:Polynucleotides; D012487:Salmonidae; D013094:Spermatozoa; D013941:Thymine / Q000494:pharmacology*
chemical_list: D008670:Metals; D011119:Polynucleotides; D004247:DNA; D013941:Thymine