Nucleosome positions.

<p>Nucleosome positions on the promoters of one active locus (<i>Gapdh</i>) and two repressed loci (<i>Nanog</i> and <i>Pou5f1</i>) were mapped by ChIP-qPCR of mononucleosomes from purified genomic chromatin (black) and from nuclei (red). Peak height reflects nucleosome occupancy, and dashed lines denote the centers of nucleosome peaks in nuclei.