TABLE 1.

Two classification kinds of lncRNAs.

Category	Feature
Classification based on genomic location
Sense LncRNA	transcribed from the same direction
Antisense LncRNA	transcribed from the opposite direction
Bidirectional LncRNA	transcribed from the same and opposite direction
Intronic LncRNA	transcribed from intronic regions of genes
Intergenic LncRNA	transcribed from intergenic transcription of two genes
Classification based on function
Signals LncRNA	act as molecular signal or indicator
Decoy LncRNA	bind to and sequester other regulatory RNAs or proteins
Guide LncRNA	direct the localization
Scaffold LncRNA	act as platform