序号:1 题目:Tandem repetitive guanine-rich DNA can fold in the presence of K+ or Na+ into a four-stranded structure named G-quadruplex via Hoogsteen hydrogen bonding. 链接:http://www.sciencedirect.com/science/article/pii/0092867489906107 期刊:cell 作者:James R. Williamson★, M.K. Raghuraman↑, Thomas R. Cech