Figure 2.

Selected snapshots from the magnesium-containing ssRNA simulations: (a) one bound Mg²⁺ ion directly coordinated at phosphate group P2 in a CC ssRNA fragment; (b) one solvated Mg²⁺ ion interacting through its inner hydration shell with phosphate groups P1 and P2 in a CC ssRNA fragment; (c) one bound Mg²⁺ ion directly coordinated at O5 from the guanine base in a GC ssRNA fragment.