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The prion protein coordinates copper with high affinity in the regions encompassing residues 92–99 (GGGTHSQW) and 106–115 (KTNMKHMAGA). Cu(II) binding to these sites involves the coordination of the His96/His111 imidazole ring and backbone deprotonated amides that precede the His residue. Such a coordination arrangement involves the formation of hexa- and penta-membered cycles that provide further...
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