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 TGAGGTAGTAGGTTATATAGTT CTATACAGCCTGCTAGCTTTCC GTACATGAATGGTCCTTACGTGAGGTAGTAGGTTATATAGTTTGGAGATACACTCAATGGCGATAGCTATACAGCCTGCTAGCTTTCCTTGGGCCATTCAC 3 0 5' arm Strongylocentrotus_purpuratus mirbase let-7 1e-37 mmu-let-7a-2 0.000000000005 -39.6 .....((((((((((......(((.(((((((((.(((((((..(((.....))).........))))))).))))))))).))).....)))))))))). (-39.60)