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Amyloid-like fibrils formed by the synthetic octapeptide corresponding to the C terminus of medin. The fibrils were long and about 7 nm in diameter. Prolonged incubation resulted in heavier aggregation, with longer and thicker fibrils consisting of thinner fibrils twisted around or parallel to each other. The fibrils were Congo red-positive and exhibited green birefringence in polarized light. (Bar = 100 nm.)
