Frequency of gene body vs. promoter methylation among tissues. Among genes with promoter and/or gene body methylation, promoter methylation is more prevalent, and both features are methylated ~15-30% of the time. The exception is male catkin, for which gene body methylation is prevalent.
Vining et al. BMC Genomics 2012 13:27 doi:10.1186/1471-2164-13-27