Examples of site-specific DNA methylation potentially mediated by PASRs (promoter-associated small RNAs) and TASRs (terminus-associated small RNAs) in Arabidopsis.

(A) Site-specific DNA methylation signals were observed within the genomic region surrounding the TSS (transcription start site; marked by a vertical dashed line) of AT1G53265. Accordingly, abundant small RNAs (i.e. PASRs) were mapped onto this region. (B) Site-specific DNA methylation signals were detected within the genomic region surrounding the transcription terminus of AT5G54700. Accordingly, abundant small RNAs (i.e. TASRs) were mapped onto this region. Arabidopsis epigenome maps (neomorph.salk.edu/epigenome/epigenome.html) [32] were employed for this analysis.