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The digestive enzyme pepsin and its inactive precursor pepsinogen, which contains an additional prosegment (PS) domain that spans its active site, serve as an excellent model system to study unfolding resistance: pepsin is unusually stable and unfolds on the order of months, whereas pepsinogen unfolds in minutes.

We study protein biophysics at the single molecule level, amyloid fibrils derived from plant proteins and nanomaterials developed from such proteins.