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- W2022087352 abstract "The absorption spectrum of the amyloid beta 1−40 peptide (Aβ1−40) conjugated to gold colloidal suspension of 15, 20, 30, and 40 nm size were examined under temperature ranging from 5 to 50 °C. As the pH was externally altered repetitively between pH 4 and 10, Aβ1−40-coated 20 nm gold colloid nanoparticles exhibited a reversible color change at the entire temperature range tested in this study except for 5 ± 0.2 °C. This reversible change may be due to the fact that hydrophilic Aβ1−40 evolves between a three-dimensional network containing mainly β-sheet and α-helices, and an intermediate of this process implies a reversible step reported as initiation of the fibrillogenesis in Alzheimer’s disease. When other nanosize particles were investigated, Aβ1−40-coated 30 and 40 nm colloids exhibited the reversible color change when temperature was lowered to 18 ± 0.2 and 6 ± 0.2 °C, respectively. This specific and unique size and temperature dependence in reversible color change strongly suggests that the noncovalent intrinsic intermolecular potential formed between the nanocolloidal surface and each Aβ1−40 monomer conjugated at the surface drives the process." @default.
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- W2022087352 date "2009-12-29" @default.
- W2022087352 modified "2023-09-25" @default.
- W2022087352 title "Temperature Dependence of Conjugation of Amyloid Beta Protein on the Surfaces of Gold Colloidal Nanoparticles" @default.
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- W2022087352 doi "https://doi.org/10.1021/jp907880f" @default.
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