Stability constants of complexes of copper(II) ions with some histidine peptides
- 1 January 1975
- journal article
- Published by Royal Society of Chemistry (RSC) in J. Chem. Soc., Dalton Trans.
- No. 3,p. 268-272
- https://doi.org/10.1039/dt9750000268
Abstract
Values at 37 °C and 0·15M(KNO3) for equilibrium constants of copper(II) complexes of glycylhistidine, glycyl-histidylglycine, histidylglycine, and carnosine have been obtained from pH titration data by minimising the computed standard deviation in titre for a range of metal ion and ligand concentrations. Account was taken of the formation of protonated, hydrolysed, and polynuclear complexes as well as of MLn-type complexes. A comparison is made of the copper-complexing abilities of these peptides in competition with α-amino-acids under physiological conditions.Keywords
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