5mC	5-methylcytosine
AGO	ARGONAUTE
CLSY1-4	CLASSY1-4
CMT2	CHROMOMETHYLASE 2
CMT3	CHROMOMETHYLASE 3
DCL	DICER-LIKE
ddc	the drm1 drm2 cmt3 mutant
ddcc	the drm1 drm2 cmt2 cmt3 mutant
DME	DEMETER
DML2	DEMETER-LIKE 2
DML3	DEMETER-LIKE 3
Dnmt1	DNA methyltransferase 1
DRM1	DOMAINS REARRANGED METHYLTRANSFERASE 1
DRM2	DOMAINS REARRANGED METHYLTRANSFERASE 2
KTF1	KOW DOMAIN-CONTAINING TRANSCRIPTION FACTOR 1
MEG	maternally expressed imprinted gene
MET1	DNA METHYLTRANSFERASE 1 in plants
NRPE1	NUCLEAR RNA POLYMERASE E1
PcG	Polycomb group proteins
PEG	paternally expressed imprinted gene
RdDM	RNA-directed DNA methylation
RDR	RNA-dependent RNA polymerase
ROS1	REPRESSOR OF SILENCING 1
siRNA	small interference RNA
TET	Ten-eleven-translocation enzyme
TSS	transcriptional start site
TTS	transcriptional termination site