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• W1992389969 abstract "The immobilisation of bio-receptors on transducer surfaces is a key step in the development of biosensors. The immobilisation needs to be fast, cheap and most importantly should not affect the biorecognition activity of the immobilised receptor. The development of a protocol for biomolecule immobilisation onto a surface plasmon resonance (SPR) sensor surface using inexpensive polythiol compounds is presented here. The method used here is based on the reaction between primary amines and thioacetal groups, formed upon reaction of o-phthaldialdehyde (OPA) and thiol compounds. The self-assembled thiol monolayers were characterised using contact angle and XPS. The possibility to immobilise proteins on monolayers was assessed by employing BSA as a model protein. For the polythiol layers exhibiting the best performance, a general protocol was optimised suitable for the immobilisation of enzymes and antibodies such as anti-prostate specific antigen (anti-PSA) and anti Salmonella typhimurium. The kinetic data was obtained for PSA binding to anti-PSA and for S. typhimurium cells with a detection limit of 5 × 106 cells mL−1 with minimal non-specific binding of other biomolecules. These findings make this technique a very promising alternative for amine coupling compared to peptide bond formation. Additionally, it offers opportunity for immobilising proteins (even those with low isoelectric point) on neutral polythiol layers without any activation step." @default.
• W1992389969 created "2016-06-24" @default.
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• W1992389969 date "2010-01-15" @default.
• W1992389969 modified "2023-10-17" @default.
• W1992389969 title "The application of polythiol molecules for protein immobilisation on sensor surfaces" @default.
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• W1992389969 doi "https://doi.org/10.1016/j.bios.2009.09.030" @default.
• W1992389969 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/19879749" @default.
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