Interaction of epicatechin with bovine serum albumin using fluorescence quenching combined with chemometrics

被引：8
作者：
Zhai Min [1 ]
Wu HaiLong [1 ]
Zhang ShuRong [1 ]
Zhang XiHua [1 ]
Sun YanMei [1 ]
Yu RuQin [1 ]
机构：
[1] Hunan Univ, Coll Chem & Chem Engn, State Key Lab Chemo Biosensing & Chemometr, Changsha 410082, Hunan, Peoples R China
来源：
SCIENCE CHINA-CHEMISTRY | 2014年 / 57卷 / 05期
基金：
中国国家自然科学基金;
关键词：
epicatechin; bovine serum albumin; three-dimensional fluorescence quenching; trilinear decomposition method; in situ interpretation of binding parameters; TRILINEAR DECOMPOSITION; TRYPTOPHAN; BINDING; CALIBRATION; FLAVONOIDS;
D O I：
10.1007/s11426-013-4987-5
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
The interaction between BSA and epicatechin was studied using fluorescence quenching titrations combined with trilinear decomposition method and excitation-emission matrix (EEM) fluorescence. The resolved spectra were highly similar with the actual ones which indicated that the resolved results were reliable. The relevant parameters of the binding process were obtained by quantifying each substance in the complicated mixtures in situ. The quenching was static quenching, epicatechin had a weak interaction with BSA and the binding site was one. The total concentration and the free concentration of quenchers had different effect on the system. The results demonstrated that the method exploited in this article is a useful tool to investigate complicated interactions, avoiding complicated pretreatment and simplify experimental procedure.
引用
收藏
页码：748 / 754
页数：7
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