Reactions of dichloride anion radicals with aliphatic peptides in aqueous solutions.
نویسندگان
چکیده
増田高広,林 多聞,近 藤正春:東 京都立大学理学部 化学 科,東 京都世 田谷区深沢2-1-1〒158 Flash photolysis/Anion Radical/Aliphatic peptide Rate constants for the reactions of dichloride anion radicals with aliphatic peptides were determined by a conventional flash photolysis of 1 M solutions of potassium chloride contain ing aliphatic peptides. The rate constants were found to increase with increasing number of C-H bond. Partial rate constants were assigned to each C-H bond of the aliphatic peptides, as estimated for the reactions of hydroxyl radicals with the same substrates. Trend in the partial rate constants and the effect of a protonated amino group on the reactivity indicate a reaction mechanism, hydrogen atom abstraction, similar to hydroxyl radicals.
منابع مشابه
Reactivity of aliphatic peptides toward hydroxyl radicals in aqueous solution.
増 田高廣,吉 原清隆,篠 原広行,近 藤正春:東 京都立大学理学部化学教室,東 京都世 田谷 区深 沢2-1-1〒158 Rate constants for the hydrogen abstraction reactions of hydroxyl radicals from aliphatic peptides and N-acetyl amino acids were determined by the p-nitrosodimethylaniline method in gamma-irradiated solutions. For peptides, enhancement of reactivity toward hydroxyl radicals was expected, because of disappearance of suppression by NH3...
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ورودعنوان ژورنال:
- Journal of radiation research
دوره 23 3 شماره
صفحات -
تاریخ انتشار 1982