PseudoBase is a database containing structural, functional and sequence data related to RNA pseudoxadknots.
For each pseudoknot, thirteen items are stored, for example the relevant sequence, the stem positions of the pseudoknot, the EMBL accession number of the sequence and the support that can be given regarding the reliability of the pseudoxadknot.
As of 2002, the database contains 230 entries with classical H-type pseudoknots as well as more complicated ones.