Applications of protein-based capacitive Biosensors for the detection of heavy-metal ions

被引:0
|
作者
Mortari, Alessia [1 ]
Browns, Nigel L. [2 ]
Geczy, Carolyn [3 ]
Coster, Hans G. L. [4 ]
Valenzuela, Stella M. [5 ]
Martin, Donald [5 ]
Csoregi, Elisabeth [1 ]
机构
[1] Lund Univ, Dept Analyt Chem, POB 124, S-22100 Lund, Sweden
[2] Univ Birmingham, Sch Biol Sci, POB 363, Birmingham B15 2TT, W Midlands, England
[3] Univ New South Wales, Sch Pathol, Sydney, NSW 2052, Australia
[4] Univ Sydney, Sch Chem Biomol Engn, Sydney, NSW, Australia
[5] Univ Technol Sydney, Inst Nanoscale Technol, Sydney, NSW 2007, Australia
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中图分类号
R318 [生物医学工程];
学科分类号
0831 ;
摘要
Three different methods of using protein-based capacitive biosensors for the detection of heavy-metal ions are presented. The metal-binding proteins SmtA, S100A12, MerP and four modified MerPs were immobilised as the biorecognition element on self-assembled monolayer-modified gold electrodes. Capacitance was measured using potential square step or electrical impedance spectroscopy. The protein-metal interaction generated changes in capacitance mainly due to a protein conformational change.
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页码:304 / +
页数:2
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