Heterogeneity at the 5' and 3' ends of the sequenced tags. Pre-miRNAs, structures, and multiple isoforms of expressed mature bmo-mir-263a, bmo-let-7a and bmo-mir-317 sequences and their read counts are shown. Underlined sequences are annotated in miRBase 14.0. The boxed sequences have the highest read counts. The annotated mature sequence of bmo-mir-317 was not identified, while the maximal sequence in the whole body was strongly accumulated in the two other libraries, and consequently regarded as the most active isoform.