Abstract
A "bendy" protein sensor: A DNA-based sensor that uses folded DNA (through DNA kinks) and protein-induced bending to detect DNA-binding proteins is presented. Single-molecule sensing of a transcriptional activator (catabolite activator protein, CAP, which bends its DNA site by 80°) is demonstrated in solution and on surfaces, both in buffers and in cell lysates. The method should allow detection of a wide range of DNA-bending proteins.
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