抗坏血酸：一种超氧自由基清除剂。
Ascorbic acid: a scavenger of superoxide radical.
作者信息
Som S, Raha C, Chatterjee I B
出版信息
Acta Vitaminol Enzymol. 1983;5(4):243-50.
PMID:6324567
Abstract
The second order rate constant for the reaction between ascorbic acid and superoxide at pH 7.4 using the xanthine-xanthine oxidase system was estimated to be 5.4 x 10(6) M-1 sec-1. The results indicate that the efficacies of superoxide dismutase and ascorbic acid for catalyzing the decay of superoxide radical in animal tissues are similar. The significance of ascorbic acid as a scavenger of superoxide is discussed from the point of view of evolution of ascorbic acid synthesizing capacity in the terrestrial vertebrates.
摘要
在pH 7.4条件下，使用黄嘌呤-黄嘌呤氧化酶系统测定的抗坏血酸与超氧化物反应的二级速率常数估计为5.4×10⁶ M⁻¹ s⁻¹。结果表明，超氧化物歧化酶和抗坏血酸在催化动物组织中超氧自由基衰变方面的效率相似。从陆地脊椎动物抗坏血酸合成能力的进化角度讨论了抗坏血酸作为超氧化物清除剂的意义。
Zotero 插件