Table 1.

Types of long non-coding RNAs.

Long non-coding RNA	Symbol	References
Long intergenic non-coding RNA	LincRNA	[19,20]
Long intronic non-coding RNA		[14,21]
Natural antisense transcript	NAT	[22–24]
Promoter-associated long RNA	PALR	[25]
Promoter upstream transcript	PROMPT	[26]
Repetitive element-associated non-coding RNA		[27–29]
Transcribed pseudogene		[30,31]
Transcribed ultraconserved region	T-UCR	[32]
Enhancer-like non-coding RNA	eRNA	[33]