Figure 3
From: Starr: Simple Tiling ARRay analysis of Affymetrix ChIP-chip data
PolII along the transcriptional start site. Profiles of PolII occupancy of genes with low (least 20%) resp. high (top 10%) transcription rates (cluster 1 resp. cluster 2). The upper graphs show the mean occupancy calculated over each position along the transcription start site. The lower plots illustrate the same data, yet including the variance in the two clusters. The black line indicates the median profile of all features. The color gradient corresponds to quantiles (from 0.05 to 0.95), and the first and third quartiles are shown as grey lines. The light grey lines in the background show the profiles of individual "outlier" features.