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 TTAGATTCACGCACAAACT TTTGTGCGTGGATCTAGAG GGTTTGTGCGTGGATCTAGAGGCCATCACAACCGTCCACTACAAGACCACCCAATGGCTTTAGATTCACGCACAAACT 0 0 3' arm Populus_tremula_x_Populus_tremuloides micropc MIR403 0.0000000000003 ptc-MIR403c 8e-32 -37.92 (((((((((((((((((((((.((((.......(((........)))......))))))))))))))))))))))))) (-37.92)