. "UK" . "Nucleic Acids Res." . "NARHAD" . "0389" . "0305-1048" . "28" . "1760" . "1766" . "10.1093/nar/28.8.1760" . . "Hexahydrated magnesium ions bind in the deep major groove and at the outer mouth of A-form nucleic acid duplexes." . . . . . .