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- W2020331373 abstract "Simulated negative staining patterns of collagen fibrils were prepared for visual display by a graphical procedure in which amino acid side-chains along the staggered molecules were weighted according to their stain-excluding capacity. The simulated patterns were then compared directly with electron-optical images of collagen fibrils negatively stained with sodium phosphotungstate or lithium tungstate. These visual comparisons confirm previous observations that satisfactory matching occurs when side-chains are weighted according to their ‘bulkiness’ (average cross-sectional area or ‘plumpness’). Optimal matching at the edges of the overlap zones occurred when a hairpin-like conformation was assumed for the N-terminal telopeptides and a condensed conformation for the hydrophobic part of the C-terminal telopeptides. The negative staining pattern is known to include some element of positive staining; visual matching suggests that this additional uptake of positive staining ions occurs predominantly in the more accessible gap zone in a fibril D-period. A slight mismatching between observed and simulated patterns can be understood if the gap zone suffers greater axial shrinkage than the overlap zone when specimens are prepared for electron microscopy." @default.
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- W2020331373 title "A study of staining for electron microscopy using collagen as a model system—VIII. Simulation of the negative staining pattern" @default.
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- W2020331373 doi "https://doi.org/10.1016/0739-6260(89)90017-8" @default.
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