Superoxide dismutase copper distance

Copper, silver and gold - The paramagnetism of Cu11 has limited the use of NMR for the direct study of copper complexes, but information is readily obtained from studies of ligand nuclei. For example, the broadening of the NMR signal by copper in copper-zinc and copper-cobalt superoxide dismutases (SODs) has been used to determine the distance between the copper and the proton on bound formate (Sette et al., 1992). Also, broadening of the formate 13C NMR resonance reveals information about the orientation of the formate. 

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