Marks are enriched near transcription start sites. (A) Fold enrichment of the five marks in ±2 kb regions near TSSs in the three primates. Error bars indicate standard deviation calculated across eight individuals in each species. Asterisks indicate significance levels based on Mann-Whitney one-sided tests (*P < 0.05, **P < 0.01, ***P < 0.001). (B) Distribution of normalized peak read counts for five marks around TSSs for each of the three primates. Units are in square root of RPKM (that is, RPKM0.5) and are averaged across individuals and across genes.