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Human platelet shape change induced by cell wall polysaccharides with and without RGPs. Human platelets in PS preparations deprived of plasma components were incubated with cell wall polysaccharides extracted from S. mutans strain Xc (panels A and B) or strain Xc24R (panels C and D). Unstimulated platelets exhibited a typical discoid shape with a uniform size (panels E and F). Panels B, D, and F show portions of the corresponding top panels at higher magnification.
