title: Quantification of the Na+/K+ ratio based on the different response of a newly identified G-quadruplex to Na+ and K+.
abstract: A G-quadruplex is identified which can exhibit two different motifs, respectively, corresponding to Na(+) and K(+). The relative amount of each motif is related to the Na(+)/K(+) ratio. Based on selective recognition of the G-quadruplex motifs by a cyanine dye aggregate, a method for both colorimetric and quantitative measurements of Na(+)/K(+) ratios is constructed.
authors.affiliation: National Laboratory for Molecular Sciences, Center for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Zhongguancun North 1st street 2, Beijing 100190, PR China.
authors.forename: Hongxia
authors.initials: H
authors.lastname: Sun
authors.forename: Junfeng
authors.initials: J
authors.lastname: Xiang
authors.forename: Wei
authors.initials: W
authors.lastname: Gai
authors.forename: Yan
authors.initials: Y
authors.lastname: Liu
authors.forename: Aijiao
authors.initials: A
authors.lastname: Guan
authors.forename: Qianfan
authors.initials: Q
authors.lastname: Yang
authors.forename: Qian
authors.initials: Q
authors.lastname: Li
authors.forename: Qian
authors.initials: Q
authors.lastname: Shang
authors.forename: Hui
authors.initials: H
authors.lastname: Su
authors.forename: Yalin
authors.initials: Y
authors.lastname: Tang
authors.forename: Guangzhi
authors.initials: G
authors.lastname: Xu
mesh_terms: D002232:Carbocyanines / Q000737:chemistry; D003124:Colorimetry; D005456:Fluorescent Dyes / Q000737:chemistry; D054856:G-Quadruplexes; D015394:Molecular Structure; D011188:Potassium / Q000737:chemistry*; D012964:Sodium / Q000737:chemistry*
chemical_list: D002232:Carbocyanines; D005456:Fluorescent Dyes; D012964:Sodium; D011188:Potassium