Taxonomy Browser

Choose here the species for which you want to retrieve the sequences. Each selected level will update the menu for the next level. For each taxonomic level, the menu items have the following format "Taxon name (number of sequences in the database)"

Filter by Status: (All sequences or only reference sequences)

Filter by Taxonomy

For Organelles, only nucleomorph sequences are made available as they are true eukaryotic ribosomal sequences, in opposition to mitochodrial or chloroplastic sequences that are from prokaryotic origin.

Retrieve sequences

"This database can be freely downloaded and used for academic research. Redistribution requires permission. All requests should be addressed to Richard Christen (richard.christen at and Laure Guillou (lguillou at"

Database version: September 2012 - From Genbank 191