mature_miRNA miRNA* pre-miRNA EST_contig mismatches bulges arm species source_database RFAM_best_hit RFAM_lowest_evalue miRBase_best_hit miRBase_lowest_evalue folding_energy secondary_structure TGAGGTAGTAGGTTGTATAGTT CTGTACAACCTCCTAGCTTTCC GCCCCCAGGCTGAGGTAGTAGGTTGTATAGTTTAGAATAACATCACTGGAGATAACTGTACAACCTCCTAGCTTTCCCTGAGAT 3 0 5' arm Danio_rerio mirbase let-7 4e-37 mml-let-7a-2 3e-25 -30.1 .....((((..(((.(((.(((((((((((((.........(((......)))))))))))))))).))).)))..)))).... (-30.10)