Characterizing lncRNA profiles and functions in specific neural cell lineages. (a) Genome-wide techniques provide a robust and comprehensive way of identifying lncRNAs [7]. (b) lncRNAs can regulate gene expression at multiple levels during mouse neurogenesis, and likely other developmental processes [5,7]. miRNA, microRNA; piRNA, piwi-interacting RNA; rRNA, ribosomal RNA; snoRNA, small nucleolar RNA; snRNA, small nuclear RNA; tRNA, transfer RNA.