Fig. 2
Active chromatin distribution and transcriptional activity. a Circos plot of DNA sequence enrichment in fraction F1 polynucleosomes. The outer ring represents the chicken chromosomes, and the inner ring details the peak of F1 DNA-seq reads. Some of the most enriched genes are identified. b Gene ontology function analysis of fraction F1. The most significantly enriched GO groups (P < 0.001 in one-tailed Fisher’s exact test) are displayed. The X-axis represents the −log10 (P value). c TSS- and TTS-centered profiles of F1 chromatin enrichment for the 129 most expressed genes and for quintile classes based on gene expression levels (Additional file 2). d Heatmap of F1 chromatin DNA-seq signals spanning 1 kb on each side of TSS and TTS of genes from the galGal3 RefSeq database. All 5479 genes were ranked from top to bottom, according to their level of expression (Additional file 2)