Figure 3.

Green colored structure is the original X-ray structure of subtype-A (1XPF). Orange colored structures are average structures of (a) 0 M concentration, (b) low salt concentration, (c) high salt concentration, (d) high salt concentration with magnesium ions bound to the G₂₇₄ and G₂₇₆ phosphate groups, (e) high salt concentrations with a magnesium ion bound to the G₂₇₄ phosphate group, (f) high salt concentrations with a magnesium ion bound to the G₂₇₃ phosphate group, (g) 0 M salt concentration with three restraints and (h) 0 M salt concentration after releasing three restraints. Orange spheres are the average locations of bound magnesium, Mg(1) and Mg(2). Average structure at 0 M salt concentration is obtained from 20 to 50 ns and the other average structures are obtained from 50 to 100 ns. All structures are aligned along residue C₂₆₅ to residue G₂₇₁.