ตัวอย่างแรกเป็นตัวอย่างของ ATP–Mg2 complex
bound to adenylate kinase. The
magnesium ion is bound to the and
phosphoryl groups, and the four water
molecules bound to the remaining
coordination positions interact with groups
on the enzyme, including a conserved
aspartate residue. Other interactions have
been omitted for clarity.