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Mechanical responses of elastic proteins are crucial for their biological function and nanotechnological use. Loading direction has been identified as one key determinant for the mechanical responses of proteins. However, it is not clear how a change in pulling direction changes the mechanical unfolding mechanism of the protein. Here, we combine protein engineering, single-molecule force spectroscopy,...
Rationally enhancing the mechanical stability of proteins remains a challenge in the field of single molecule force spectroscopy. Here we demonstrate that it is feasible to use a “cocktail” approach for combining more than one approach to enhance significantly the mechanical stability of proteins in an additive fashion. As a proof of principle, we show that metal chelation and protein-protein interaction...