中性红与牛血清白蛋白相互作用特征研究  

Studies on the Binding Reaction Features between Neutral Red and Bovine Serum Albumin

作　　者：吴刚珂[1] 李杨[2] 颜承农[2] 

机构地区：[1]荆州市中心医院检验科,湖北荆州434020 [2]长江大学化学与环境工程学院,湖北荆州434020

出　　处：《长江大学学报（自科版）（上旬）》2009年第3期21-25,共5页JOURNAL OF YANGTZE UNIVERSITY (NATURAL SCIENCE EDITION) SCI ＆ ENG

基　　金：湖北省自然科学基金项目(2005ABA067)

摘　　要：在模拟动物体生理条件和不同温度下,用荧光光谱、同步荧光光谱、三维荧光光谱和紫外可见吸收光谱法等研究了中性红(Neutral Red,NR)与牛血清白蛋白(bovine serum albumin,BSA)的相互作用,证实了NR有很强地猝灭BSA荧光强度的能力。分别用Stern-Volmer方程、Line weaver-Burk双倒数方程和热力学方程等处理试验数据,得到在25～43℃度时相互作用的生成常数KLB(平均值为4.250×104kJ/mol)、热力学参数(ΔHθ、ΔGθ和ΔSθ的平均值分别为-6.432kJ/mol、-21.38kJ/mol和-48.68J/K)和结合位点数(平均值为1.155)。Under the simulated physiological conditions of animal body and different temperatures,the action of Neutral Red (NR) to bovine serum albumin (BSA) was studied by the fluorescence spectroscopy,three-dimensional fluorescence spectrum,synchronous fluorescence spectrum and ultra-violet spectrum.It is shown that this compound has a quite strong ability to quench the fluorescence launching from BSA,after analyzing and processing the fluorescence quenching data according to Sterm-Volmer equation,Lineweaver-Burk equation and thermodynamic equation,the binding constant and thermodynamic parameters are obtained.The average value of binding constant(KLB:4.250×104KJ·mol-1),thermodynamic parameters(H θ,-6.432 KJ·mol-1,Gθ:-21.38 KJ·mol-1 and Sθ:-48.68J·K-1) and amounts of binding sites(1.155) are obtained in this paper.

关 键 词：中性红 牛血清白蛋白 荧光猝灭光谱 三维荧光光谱 紫外吸收光谱 热力学参数 

分 类 号：O614[理学—无机化学]