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Figure 5.
Figure 5. View of octahedrally coordinated magnesium ions
in BC crystal structures. Nucleotide molecules and protein
residues are shown in sticks with the following atom colors:
carbon, green; nitrogen, blue; oxygen, red; phosphorus, orange.
Magnesium ions and water molecules are shown as green and red
spheres. (A) View of two magnesium-binding sites in the
SaBC/AMPPNP structure. (B) View of one magnesium-binding site in
the PaBC/AMPCP structure.
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