Co-localization of rare oligonucleotides and regulatory elements in mammalian upstream gene regions.


In order to identify putative control signals of gene expression, 634 mammalian DNA sequences spanning 1.8 x 10(6) base-pairs were analysed and the frequencies of 1024 oligonucleotides five bases long (5-tuples) were determined. We defined as rare those 5-tuples having an observed frequency less than 50% of that expected by chance on the basis of base… (More)


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