Chemical evolution of peroxidase — amino acid pentacyanoferrate (II) complexes as model

Abstract
Complexes of the type [Fe(II)(CN)5(L)] n (wheren=3, or 4;L = glycine, histidine, imidazole, and triglycine) are proposed as evolutionary model of peroxidases. Detailed kinetic investigation for disproportionation of hydrogen peroxide catalysed by [Fe(II)(CN)5(L)] n complexes at 40°C and pH 9.18 are discussed. Decomposition of hydrogen peroxide catalysed by above complexes conforms to Michaelis-Menten type kinetics.