TS The expression of lncRNAs are tissue-specific.
D The expression of lncRNAs display significant changes (the fold change >= 2) during the process of development.
H lncRNAs are highly expressed (mean RPKM/FPKM > 10) in at least one dataset of the corresponding tissue.
A The adjacent genes of lncRNAs are development-associated protein-coding genes.
C Conserved transcript.
DV Divergent lncRNA. Divergent lncRNAs that are transcribed on the opposite strand from their neighboring protein-coding genes may associate with transcription and development(Shen et al.).