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The imidazole nitrogen of the histidine side chain donates one of the three nitrogen ligands to the copper, and the position of histidine at the second residue is what enables the deprotonated amide nitrogen of the preceding Gly-His peptide bond to also coordinate the copper

Related to this, Rodriguez-Perez and colleagues (110, 129) used intrastriatal 6-OHDA injections to produce dopaminergic degeneration and noted a significant decrease in DA neurons in ovariectomized rats

Glutathione has been shown to increase walking distance without pain in patients by improving circulation and reducing oxidative damage

Plant Cell 16, 319331