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(A) Percentage of β‐sheet + β‐turn structures 5, 60 and 120 min after film formation at 15 °C as a function of solution storage time. Atomic force microscopy images of E5 interfacial films created from (B) freshly prepared solution, (C) solution stored for 7 days and (D) solution stored for 14 days. White arrows indicate amyloid fibrils.
