CpG Island Mapping by Epigenome Prediction
Figure 4
Box Plots Comparing the Promoter Strength between High-Scoring and Low-Scoring Promoter CpG Islands
This figure shows box plots of the average number of transcription start site tags per CpG island (as an indicator of promoter strength), restricted to those CpG islands that show experimental evidence of promoter activity at all (i.e., at least three transcription start site tags fall within the CpG island). Separate box plots are drawn for CpG islands that fall into different intervals in terms of their combined epigenetic score (i.e., 0 to 0.2, 0.2 to 0.4, etc.). The standard box plot format is used (boxes show center quartiles, whiskers extend to the most extreme data point that is no more than 1.5 times the interquartile range from the box, and non-overlapping notches provide evidence of significantly different medians), and outliers are hidden.