The miRBase release 22 reference files: stem-loop sequences (hairpins) and mature miRNA sequences

The miRBase Sequence Database -- Release 22

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The miRBase database provides a searchable online repository for
published microRNA sequences and associated annotation.  miRBase also
provides a gene naming and nomenclature function in the miRBase
Registry.

Release 22 of the database contains 38589 entries representing hairpin
precursor miRNAs, expressing 48885 mature miRNA products, in 271
species.  The data are freely available to all through the web
interface at http://www.mirbase.org/ and in flatfile form from
ftp://mirbase.org/pub/mirbase/.