Supported databases
===================

16S rRNA
--------

 * Greengenes ftp://greengenes.microbio.me/greengenes_release/
 * Greengenes `Core Set` (useful for NAST) http://greengenes.lbl.gov/Download/Sequence_Data/Fasta_data_files/core_set_aligned.fasta.imputed
 * QIIME-formatted SILVA https://www.arb-silva.de/download/archive/qiime/

ITS
---

 * UNITE https://unite.ut.ee/repository.php (QIIME releases)

   .. note::

      In the QIIME releases of the UNITE database the ``_s`` in the
      filename (e.g. ``sh_qiime_release_s_DD.MM.YYY.zip``) specifies
      that the database includes singletons.