pubmed-article:20024248 | pubmed:abstractText | A homogeneous assay is reported using Ru(phen)(2)(dppz)(2+) and a K(+)-binding aptamer for the selective and sensitive detection of a target oligonucleotide and potassium ions, based on reduction in fluorescence emission according to the formation of the G-quadruplex structure from the aptamer in the presence of K(+). | lld:pubmed |