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Physicists at the Technische Universitaet Muenchen (TUM) are opening a new window into the life of biological cells, using a technique that lets them grab the ends of a single protein molecule and pull, making continuous, direct measurements as it unfolds and refolds. Their latest results, reported in the journal Science, reveal a complex network of intermediate structural and kinetic states along the way to functionally correct folded forms, including both express routes and dead ends. Better understanding of protein folding is essential because incorrectly folded proteins cause diseases such as Alzheimer's and Parkinson's
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