DNA methylation of SAT5 repeat monomer containing CRP4 gene. Bisulfite sequence analysis of DNA methylation of the SAT5 repeat monomer containing the CRP4 gene (At4g09545) in wild-type plants (bottom) and an nrpe1 dcl3 double mutant (top). Methylation occurs in all three sequence contexts (CG, black; CHG, blue; CHH, red) and is concentrated in the CRP4 coding region (yellow bar). Primarily CHH methylation is reduced in the nrpe1 dcl3 double mutant. In a few cases, blue and black bars appear to be overlapping. These represent adjacent CG and CHG nucleotides that are not resolved in the figure format. CG methylation is always higher than CHG methylation.