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 AATGGCACTGAAAGAATTCACGGG CGTAGTTCTTCTGTGCCGTATT AATGGCACTGAAAGAATTCACGGGGTACATATTTACACATCACCCGTAGTTCTTCTGTGCCGTATT 2 2 5' arm Acyrthosiphon_pisum mirbase mir-263 1e-30 der-mir-263a 0.0000007 -24.77 .(((((((.(((.(((((.(((((..................))))))))))))).)))))))... (-24.77)