Affiliation:
1. Krestov Institute of Solution Chemistry, Russian Academy of Sciences
2. Ivanovo State University
Abstract
The formation of mixed-ligand complexes of various compositions in the Zn–L-histidine (His)–L-ornithine (Orn) system has been studied by pH-metry, calorimetry, and NMR spectroscopy. The thermodynamic parameters (log K, ΔrG0 ΔrH, ΔrS) of the reactions of their formation at 298.15 K and ionic strength I = 0.5 (KNO3) have been calculated. Based on the comparative analysis of thermodynamic parameters, the most probable method for the coordination of amino acid residues in mixed complexes has been proposed.
Publisher
The Russian Academy of Sciences