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. Author manuscript; available in PMC: 2017 Jul 13.
Published in final edited form as: Annu Rev Biophys. 2017 Mar 15;46:227–246. doi: 10.1146/annurev-biophys-070816-033920

Figure 3.

Figure 3

Specific binding of ions in the adenine riboswitch. (A) PDB ID: 1Y26 (124), [Mg2+]=200mM; (B) PDB ID: 4TZX (146), [Mg2+]=200mM; (C) PDB ID: 4TZY (146), [Mg2+]=150mM and [Sr2+]=50mM; (D) PDB ID: 4NXR (91), [Mg2+]=100mM. The red and orange balls present Mg2+ ions and Sr2+ ions.