Molecular model of a microRNA (miRNA) stem-loop for cbr-miR-249, a predicted miRNA of Caenorhabditis briggsae, homologous to cel-miR-249. The miRNA is shown highlighted. MiRNA's are a form of short, noncoding single stranded RNA of about 22 nucleotides (nt's) in length, and appear to regulate gene function by binding to target genes of messenger RNA (mRNA). Available at Phototake.

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