MicroRNAs (miRNAs) are endogenous 21 to 23-nucleotide RNA molecules that regulate protein-coding gene expression in plants
and animals via the RNA interference pathway. Hundreds of them have been identified in the last five years and very recent
works indicate that their total number is still larger. Therefore miRNAs gene discovery remains an important aspect of understanding
this new and still widely unknown regulation mechanism. Bioinformatics approaches have proved to be very useful toward this
goal by guiding the experimental investigations.