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Naming Convention | Meaning | Example(s) |
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3 letter prefix | Species identification. This prefix is sometimes dropped in some journals, with the species under consideration mentioned in the adjoining text. | hsa (human) dme (fruit fly) |
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pri-mir or pre-mir (not lower case “r”) | Used to indicate primary transcript of miRNA (pri-mir) or precursor form after Drosha processing (pri-mir) | pri-mir-16, pre-mir-16 |
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miR | Mature miRNA | hsa-miR-16 |
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−3p or −5p | Mature miRNA originating from the 3′ or 5′ end of the pre-miRNA, respectively | hsa-miR-142-3p hsa-miR-142-5p |
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a or b | Closely related miRNAs that are related in sequence and evolutionary origin | hsa-miR-20a hsa-miR-20b |
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−1, or −2 | Identical mature miRNA sequences that originate from different genomic loci | hsa-miR-16-1 hsa-miR-16-2 |
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miR* (star) | ‘Passenger strand’ found at lower concentration, usually degraded (retired in miRBase 17) | hsa-miR-9* |
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