Supercharged proteins enter biology's forbidden zone

Scientists are reporting discovery of a way to help proteins such as the new generation of protein-based drugs -- sometimes heralded as tomorrow's potential "miracle cures" -- get past the biochemical "Entrance Forbidden" barrier that keeps them from entering cells and doing their work. The new technique represents a new use for an engineered form of green fluorescent protein, the topic of the 2008 Nobel Prize in Chemistry.

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