Asymmetric nucleosomes flank promoters in the budding yeast genome.

S4), and a highly significant fraction of ±1 asymmetric nucleosome positions could be identified even when data from each individual experiment were analyzed independently (Data set 1: 56%, P -value = 2 × 10 −152 ; Data set 2: 48%, P -value = 2 × 10 −197 ; Data set 3: 48%, P -value = 4.3 × 10 −151 ; P -values calculated using the hypergeometric test).

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