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- W2052541485 abstract "A new assay using low-dose electron diffraction to measure the protection of protein structure against damage from drying is described. When thin single crystals of catalase are dried within water alone, low-dose electron diffraction yields no Bragg spots. Drying within an experimental aqueous solution that permits detection of diffraction spots thereby indicates a positive result, and the extent of these Bragg reflections into the high angle range gives a quantitative measure of the degree of protection. Bragg spots out to 3.7–3.9 Å are recorded for drying within 100 mM solutions of the known structure-preserving sugars, sucrose, tannin, and trehalose. The ability of trehalose to maintain native protein structure during drying starts between 10 and 25 mM, and changes only slightly at concentrations above this threshold; with drying in 150-mM trehalose, catalase crystals yield diffraction spots out to 3.7 Å. Drying within the organic nonsugar polymer polyvinylpyrrolidone gives Bragg spots to 4.0 Å. This new assay should be useful to measure the unexamined structure-preserving capabilities of modified sugars, other nonsugars, and mixtures to identify which protective matrix maintains native protein structure to the greatest extent during drying; electron crystallography using that optimal matrix should yield protein structure at improved levels of high resolution." @default.
- W2052541485 created "2016-06-24" @default.
- W2052541485 creator A5034788852 @default.
- W2052541485 date "2004-03-17" @default.
- W2052541485 modified "2023-10-18" @default.
- W2052541485 title "A Low-Dose Electron Diffraction Assay for Protection of Protein Structure against Damage from Drying" @default.
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- W2052541485 doi "https://doi.org/10.1017/s1431927604040073" @default.
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