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Greisman, H. A. and C. O. Pabo (1997). "A general strategy for selecting high-affinity zinc finger proteins for diverse DNA target sites." Science 275(5300): 657-61. A method is described for selecting DNA-binding proteins that recognize desired sequences. The protocol involves gradually extending a new zinc finger protein across the desired 9- or 10-base pair target site, adding and optimizing one finger at a time. This procedure was tested with a TATA box, a p53 binding site, and a nuclear receptor element, and proteins were obtained that bind with nanomolar dissociation constants and discriminate effectively (greater than 20,000-fold) against nonspecific DNA. This strategy may provide important information about protein-DNA recognition as well as powerful tools for biomedical research.

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