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EM pictures for PrPUP (Upper) and PrPGP (Lower). (A) Peptides incubated for 24 h in 1 mM phosphate buffer (pH 7.5) and 1 mM DTT. (Bar = 100 nm.) (B) Peptides incubated for 24 h in 1 mM phosphate buffer (pH 7.5) in the absence of DTT. (Bar = 200 nm.) (C) Peptides incubated for 24 h in 1 mM phosphate buffer (pH 7.5) and 0.1 mM reduced glutathione. (Bar = 200 nm.)
