(A) Tiling microarray data of a representative region in chromosome 3 showing the genomic distribution of the Z-total (orange), ZZ (green), AZ (purple), AA (red), and Total (blue) nucleosomes. The data are presented as the normalized ratio of nucleosomal and genomic DNA signal. Grey bars indicate coding regions. (B) Normalized average nucleosome distribution in and around the +1 nucleosome center of 466 genes (Jiang and Pugh, 2009a). Circles illustrate the estimated positions of the −1, +1, +2, +3, and +4 nucleosomes.