The
Protein Data Bank (
PDB) is a
crystallographic database for the three-dimensional structural data of large biological molecules, such as
proteins and
nucleic acids. The data, typically obtained by
X-ray crystallography,
NMR spectroscopy, or, increasingly,
cryo-electron microscopy, and submitted by
biologists and
biochemists from around the world, are freely accessible on the Internet via the websites of its member organisations (PDBe, PDBj, and RCSB). The PDB is overseen by an organization called the
Worldwide Protein Data Bank, wwPDB.