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An 1H NMR (nuclear magnetic resonance) spectroscopic structural analysis of Cd2+ complexes formed with the pentapeptide phytochelatin, (NH3)+−(ψ-Glu-Cys)2−Gly−COO−(PC2), at a pH of 7.5 showed that the two thiol groups of the Cys residues and either the carbonyl or amide group of the peptide bond between Glu1 and Cys1 act as possible donor groups in the complexes at Cd2+/PC2 ratios up to 0.4. As the...
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