Figure 2. DNA methylation profiles of nucleosome-bound DNA in Arabidopsis.
The weighted average percent DNA methylation was calculated and plotted at each distance from nucleosome start sites (0). a, b, c, CG methylation (a), CHG methylation (b), and CHH methylation (c) each show a 10 base periodicity over nucleosome-bound DNA (1–147 bases). Fast Fourier Transforms (FFTs) can be used to deconstruct inherent frequencies in a complex signal. The FFTs calculated over the region of the nucleosome demonstrate this periodicity in CG (a), CHG (b), and CHH (b) contexts.