4 rezultatet
The reduction of Cu(330) in Rhus vernicifera laccase by chromous ion is 30% faster than reduction of Cu(614) at room temperature [pH 4.8, mu = 0.1 (NaCl)], and two parallel first-order paths, attributed to heterogeneity of the protein, are observed at both wavelengths. The reactions of stellacyanin,
A simple colorimetric test for the Cu(I) content in blue copper proteins is described. The procedure is based on the formation of a complex between Cu(I) and 2,2'-biquinoline in an acetic acid medium. Analyses of spinach plastocyanin, Pseudomonas aeruginosa azurin and Rhus vernicifera stellacyanin
Two specific antibodies, directed toward hydrolyzable tannins, i.e. polygalloylated or oxidized derivatives of 1,2,3,4,6-penta-O-galloylglucose, and toward an acyltransferase from oak leaves that catalyzes the biosynthesis of this principal precursor, were used in immunocytochemical studies to
The thermodynamic parameters of the conformational transition occurring at low pH (acid transition, AT) in blue copper proteins, involving protonation and detachment from the Cu(I) ion of one histidine ligand, have been determined electrochemically for spinach and cucumber plastocyanins, Rhus