Nitrogen depletion in the fission yeast Schizosaccharomyces pombe causes nucleosome loss in both promoters and coding regions of activated genes

Averages over different groups of genes of H3, H3AcK9, and H4AcK5 profiles before and after nitrogen starvation. (A) All genes in the genome; (B) up-regulated genes; (C) down-regulated genes. The positions relative to the coding regions are shown on the x-axis. The genes in each group were aligned so that the starts and stops of the open reading frames would coincide. Since the open reading frames have different lengths, relative positions were used inside the coding regions. In addition, flanking regions of 1000 bp were included on each side. The y-axis shows the average signal (on a log₂ scale) for each combination of antibody and condition (plus or minus nitrogen).