Oxy 1.5 with Ammonium Ions

N.V. Hud, P. Schultze, V. Sklenar, and J. Feigon: "Binding sites and dynamics of ammonium ions in a telomere repeat DNA quadruplex" J. Mol. Biol. 285, 233-43(1999). [abstract]

The structure of the quadruplex formed by the sequence [d(G₄T₄T₄ )]₂, with the NH₄⁺ ions bound between the G-quartets.