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. Author manuscript; available in PMC: 2014 Jan 15.
Published in final edited form as: WormBook. 2013 Jun 4:1–34. doi: 10.1895/wormbook.1.45.2

Figure 6. Examples of ChIP-chip data for RNA polymerase II (Pol II) and five different histone modifications.

Figure 6

The X axis represents a stretch of Chr IV from nt 12,341,610 to 12,472,625. Coding genes are shown below, with arrows marking the direction of transcription 5'>3'. The Y axis represents the z-score of the log 2 ratios of IP/Input (mean centered and scaled to stdev=1). Note the opposing pattern of H3K27me, a mark associated with gene silencing, with that of activation marks such as H3K4me and H3K36me. Image courtesy of Susan Strome and Andreas Rechsteiner.