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In molecular biology, mir-46 (MI0000017) and mir-47 (MI0000018) are microRNA expressed in C. elegans from related hairpin precursor sequences. The predicted hairpin precursor sequences for Drosophila mir-281 (MI0000366, MI0000370) are also related and, hence, belong to this family. The hairpin precursors (represented here) are predicted based on base pairing and cross-species conservation; their extents are not known. In this case, the mature sequences are expressed from the 3' arms of the hairpin precursors.
References
Lau NC, Lim LP, Weinstein EG, Bartel DP (October 2001). "An abundant class of tiny RNAs with probable regulatory roles in Caenorhabditis elegans". Science. 294 (5543): 858–62. doi:10.1126/science.1065062. PMID11679671. S2CID43262684.