Vertebrate MicroRNA Genes

MicroRNAs (miRNAs) are an abundant class of ∼22-nucleotide (nt) noncoding RNAs, some of which are known to control the expression of other genes at the posttranscriptional level ([1–4][1]). We developed a computational procedure (MiRscan) to identify miRNA genes ([5][2]) and apply it here to