Copper(II) and zinc(II) complexes of glycylglycyl-L-histidine and derivatives
- 1 January 1977
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in J. Chem. Soc., Dalton Trans.
- No. 1,p. 53-57
- https://doi.org/10.1039/dt9770000053
Abstract
Computer-assisted analysis of pH-titration data has afforded equilibrium constants at 37 °C and /= 0.15 mol dm–3. (K[NO3]) for copper(II) and zinc(II) complexes of glycylglycyl-L-histidine (Gly-Gly-His), Gly-Gly-His-Gly-Gly, their alkyl esters, and their benzyloxycarbonyl derivatives. The types of complexes and their equilibrium values are similar to those formed by Gly-His. Binuclear complexes are major components of the systems containing ZnII. The copper peptide complexes are reasonable models for the binding of CuII by albumin, but the disparity between constants for zinc–peptide and –albumin complexes indicates that a different binding site is involved.Keywords
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