We have devised a cyclical immunoprecipitation protocol that can be used to identify and clone a specific DNA sequence that is recognized by a DNA binding protein, even if that sequence is present in only one copy in the genome of a mammal. As an example, we have used this procedure to purify mouse genomic sequences to which the simian virus 40 tumor (T) antigen binds.
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Sompayrac et al. (1990) studied this question.
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