15NH4+ ion movement inside d(G4T4G4)2 G-quadruplex is accelerated in the presence of smaller Na+ ions.
2D NMR studies demonstrate that the residence lifetime of 15NH4+ ions within the bimolecular G-quadruplex adopted by d(G4T4G4) is reduced from 270 ms in the presence of ammonium ions alone to 36 ms in the presence of Na+ ions.
Sket
Primoz
P
NMR center, National Institute of Chemistry, Hajdrihova 19, SI-1000 Ljubljana, Slovenia.
Crnugelj
Martin
M
Kozminski
Wiktor
W
Plavec
Janez
J