Positioning of boundary nucleosomes within open chromatin.

<p>(A) Superposition of <i>in vivo</i> and <i>in vitro</i> nucleosomes, and FAIRE read density across the boundaries of promoter-associated (left) or non-associated (right) open chromatin in yeast. (B) Superposition of <i>in vivo</i> and <i>in vitro</i> nucleosomes, and FAIRE read density across the boundaries of promoter-associated (left) or non-associated (right) open chromatin in human.