Adsorption of proteins onto surfaces containing end-attached oligo(ethylene oxide): a model system using self-assembled monolayers
作者:Kevin L. Prime、George M. Whitesides
DOI:10.1021/ja00076a032
日期:1993.11
This paper reports a study of the adsorption of four proteins-fibrinogen, lysozyme, pyruvate kinase, and RNAse A-to self-assembled monolayers (SAMs) on gold. The SAMs examined were derived from thiols of the structure HS(CH 2 ) 10 R, where R was CH 3 , CH 2 OH, and oligo(ethylene oxide). Monolayers that contained a sufficiently large mole fraction of alkanethiolate groups terminated in oligo(ethylene oxide)
本文报告了四种蛋白质 - 纤维蛋白原、溶菌酶、丙酮酸激酶和 RNA 酶 A 对金上自组装单层 (SAM) 的吸附研究。所检查的 SAM 源自结构为 HS(CH 2 ) 10 R 的硫醇,其中 R 是 CH 3 、CH 2 OH 和低聚(环氧乙烷)。含有足够大摩尔分数的链烷烃硫醇基团终止于低聚(环氧乙烷)链的单层抵抗所有四种蛋白质的动力学不可逆、非特异性吸附。较长的低聚(环氧乙烷)链在单层中的较低摩尔分数下具有抗性。对蛋白质吸附的抵抗力随着低聚(环氧乙烷)链的长度而增加:阻止吸附的链的最小摩尔分数与 n -0.4 成正比,其中 n 表示每条链的环氧乙烷单元数