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Dnase footprinting

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Dnase footprinting

(Science: molecular biology) a lab technique used to find out which segments of a dna molecule are protected by dna-binding proteins from attack by endonuclease enzymes, which break down dna into smaller fragments by cleaving its phosphodiester bonds. The technique does this with gel electrophoresis to find out which parts of the dna have sites for proteins to attach to them, by comparing dna which has been in the presence of dna-binding proteins with dna that is pure.