One the most important discoveries of the post-genomic era is that a large fraction of the genome transcribes a heterogeneous population of noncoding RNAs (ncRNA). ncRNAs shorter than 200 nucleotides are usually identified as short/small ncRNAs-examples include PIWI-interacting RNAs, small interfering RNAs, and microRNAs (miRNAs)-whereas those longer than 200 nucleotides are classified as long ncRNAs (lncRNAs). These molecules are emerging ...
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