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AFM images of rPrP fibrils formed under different conditions. A and C, fibrils formed in 2 m GdmCl for 8 h. B and D, fibrils formed in 4 m GdmCl for 3 days. E, fibrils formed in 2 m GdmCl for 2 days. F, fibrils formed in 4 m GdmCl for 6 days. Scale bars = 250 nm.
