TaqMan™ Advanced miRNA Assay

An alias is the miRBAse ID for a given miRNA from an earlier version. Alias information is found in the Details section of the search results. The miRBase release version shown in parentheses represents when the alias miRBase ID was last listed.

An assay for a human miRNA may have a lower species name because the target sequence was first introduced and published in miRBase for that species and only later found in human. For example, mmu-miR-124a was first introduced as a mouse miRNA. The human miRNA was introduced later.

Accession numbers are unique identifiers assigned to both hairpin (e.g.: MI0000015) and mature (e.g.: MIMAT0000029) sequences. While miRBase names may change, the accession numbers are stable and remain associated with a specific sequence.

The mirBase ID is the official miRBase name given to a mature miRNA sequence. There may be multiple miRBase IDs for a given mature miRNA sequence because many miRNAs are conserved across species (for example, several hundred human miRNAs have the identical sequence in common with the mouse species). The miRBase ID consist of a 3 letter species identifier, including the first letter of the genus and the first two letters of the species, followed by the expression “miR”, and then a numeric suffix, e.g.: hsa-miR-212. Since two distinct mature miRNAs can be derived from the different arms of the same stem-loop precursor, a -5p or -3p suffix specifies the particular arm of the stem from which they come, e.g.: hsa-miR-501-5p is derived from the 5' end of the stem, while hsa-miR-501-3p is derived from the 3' end. The miRNA gene and hairpin precursor locus name is given lower case: hsa-mir-212. If a mature miRNA is predicted to be expressed from more than one hairpin precursor, then a numeric suffix is added to the precursor name. For example, hsa-miR-101 is expressed from two precursor loci, hsa-mir-101-1 and hsa-mir-101-2. Closely related miRNAs are given lettered suffixes (hsa-miR-19a-3p and hsa-miR-19b-3p) and are expressed from similarly named precursors (hsa-mir-19a-3p and hsa-mir-19b-3p).

miRBase continues to re-annotate the miRNA sequences as more information becomes available. Updated versions of miRBase are released on a regular basis. At the time of print (June 2013), it was up to v20.

Yes. Like our other TaqMan assays, the miRNA assays are shipped at ambient temperatures and are stable for multiple days.

Find additional tips, troubleshooting help, and resources within our TaqMan Protein Assay Support Center.