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• W2110346524 endingPage "1387" @default.
• W2110346524 startingPage "1380" @default.
• W2110346524 abstract "Various activated supports (cyanogen bromide, glutaraldehyde, epoxy-chelates, primary amino) were evaluated for the immobilization of IgG anti-horseradish peroxidase. Cyanogen bromide and glutaraldehyde supports greatly reduced the recognition capacity of the antigen, probably due to the incorrect orientation of the antibody on the support. Hetero-functional epoxy-chelate and immobilization by the sugar chain on primary amino groups had little effect on high recognition of the antigen (near to the theoretically expected value). However, the immobilization by the sugar chain resulted in a higher adsorption rate of horseradish peroxidase, possibly due to a favourable orientation on a flexible spacer arm). Antibodies immobilized on aminated surfaces showed two major drawbacks. Firstly, the biological activity of the immobilized antibody sharply decreased over several days when stored at low ionic strength, although this effect could be partially reversed by incubation at high ionic strength. Secondly, a high level of non-specific proteins adsorption on the support surface was observed. Both problems could be successfully resolved by controlling the coating of the support with aldehyde-aspartic-dextran. We propose that the loss of biological activity was related to the ionic adsorption of the immobilized antibody on the support surface, leading to a blocking of the recognition areas. This optimized protocol was applied to the immobilization of IgG anti-horseradish peroxidase from rabbit on magnetic nano-particles. A 10 microg preparation of nano-particles was able to capture more than 75% of the 0.1 microgram of recombinant horseradish peroxidase present in 10 L of crude protein extract (1g/L) from Escherichia coli." @default.
• W2110346524 created "2016-06-24" @default.
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• W2110346524 date "2005-01-01" @default.
• W2110346524 modified "2023-10-08" @default.
• W2110346524 title "Preparation of inert magnetic nano-particles for the directed immobilization of antibodies" @default.
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• W2110346524 doi "https://doi.org/10.1016/j.bios.2004.06.004" @default.
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