Protein Data Bank file format is a most popular format for holding biological macromolecular data. This is a very fast sequential parser: below 7s for the largest entry in PDB - 1HTQ which is over 70MB - as compared with 11s of RASMOL 2.7.5, or 2m15s of BioPython with Python 2.6 interpreter. In its parallel incarnation it is most probably the fastest parser for PDB format. It is aimed to not only deliver event-based interface, but also a high-level data structure for manipulating data in spirit of BioPython's PDB parser. hPDB - Haskell library for processing atomic biomolecular structures in Protein Data Bank format - Michal Jan Gajda. BMC Research Notes 2013, 6:483.