Carpio Rodríguez, Ana MaríaBonilla, Luis L.Prados, Antonio2023-06-192023-06-192013-06https://hdl.handle.net/20.500.14352/36189Single-molecule atomic force spectroscopy probes elastic properties of proteins such as titin and ubiquitin. We analyze bioprotein folding dynamics under both force and length-clamp conditions by modeling polyprotein modules as particles in a bistable potential, connected by harmonic springs. The study of multistable equilibria in these models explains recorded sawtooth force-extension curves. We show that bifurcations and transitions through quasi-stationary domain configurations modified by thermal noise are involved in observed stepwise and abrupt refolding and unfolding phenomena under force-clamp conditions. These predictions agree with experimental observations.engconference paperopen access51:57Física-Modelos matemáticosBiomatemáticas2404 Biomatemáticas