[Effect of different substances on the x-ray chemiluminescence of solutions of serum albumin and glycyltryptophan].

Effect of different substances, such as known radioprotectors, inhibitors of free radical processes from the class of 3-oxipyridines and methanol on the characteristics of X-chemoluminescence of human serum albumin solutions and glycyl-triptophane is studied. Possible causes of various effects of added substances on X-chemoluminescence are considered: reactions of the additives with hydroxyl radicals, with primary free radicals and peroxid radicals of protein and peptide. In most substances studied protection is partially concerned with their reactions with hydroxyl radicals and partially with the reaction between additives and free radicals of peptide and protein. When methanol and inhibitors of the 3-oxipyridine class are used as acceptors the reaction between acceptors' free radicals and protein molecules makes a large contribution which results in a decrease of protection. Kinetic data and rate constants of reactions qualitatively describing the effects under study are obtained.