code	description
Pr-A	Promoter, Active
Pr-W	Promoter, Weak
Pr-B	Promoter, Bivalent
Pr-F	Promoter, Flanking
Tr-S	Transcription, Strong
Tr-S2	Transcription, Strong 2
Tr-P	Transcription, Permissive
Tr-I	Transcription, Initiation
En-Sd	Enhancer, Strong TSS-distal
En-Sp	Enhancer, Strong TSS-proximal
En-Pd	Enhancer, Poised TSS-distal
Hc-P	Heterochromatin, Polycomb-associated
Hc-Pw	Heterochromatin, Polycomb-associated weak
Hc-H	Heterochromatin, H3K9me3-associated
NS	No significant signal