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- W1793516851 abstract "The mechanism of formation of the negatively stained image in electron microscopy was investigated with native collagen fibrils as a model. The negatively stained image was simulated from the primary structure by using the values of volume or bulkiness of each amino acid residue as a parameter for stain-excluding capacity. The pattern simulated from the bulkiness values gave an excellent fit with the negatively stained image. Since some contribution of positive staining components to negative staining has been suggested, positive staining with uranyl acetate was tested with various washing solutions of different pH. While acidic conditions did not produce any stained image, a positively stained image was easily obtained at alkaline pH. On the other hand, negatively stained images with stains of different charge character remained essentially the same as those obtained with acidic uranyl stains. It was concluded that the contribution of positive components to the negatively stained image is negligible under the conventional conditions for negative staining with uranyl acetate. In order to demonstrate the utility of the analytical method employing the values of “bulkiness,” we studied the unknown molecular packing in the polar lead paracrystal of rabbit skeletal tropomyosin. Utilizing the primary sequence data for α-tropomyosin we successfully showed the polar paracrystal to be an array of molecules which are parallel and in register. Further, our analysis made it possible to deduce the position of a given residue in the negatively stained pattern of the polar paracrystal." @default.
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- W1793516851 date "1979-11-01" @default.
- W1793516851 modified "2023-10-01" @default.
- W1793516851 title "Quantitative Analysis of the Mechanism of Negative Staining with Native Collagen Fibrils and Polar Tropomyosin Paracrystals1" @default.
- W1793516851 doi "https://doi.org/10.1093/oxfordjournals.jbchem.a132668" @default.
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