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Electron micrographs of the DSAg fibrils. (a) DSAg at neutral conditions (pH 6.5) under ×70,000 magnification. (b) DSAg at acidic conditions (pH 2.4) under ×70,000 magnification. The Inset is shown at ×276,000 magnification. Notice the fibril is composed of several protofibrils.
