The Protein Data Bank (PDB) is a database for the three-dimensional structural data of large biological molecules such as proteins and nucleic acids, which is overseen by the Worldwide Protein Data Bank (wwPDB).

Research Collaboratory for Structural Bioinformatics (RCSB) is a consortium consisting of three institutions: Rutgers University, San Diego Supercomputer Center at University of California, San Diego, and the National Institute of Standards and Technology.

Basic Search can be run from any page on the RCSB PDB Website by simply typing a search term or a protein/DNA/RNA sequence into the Search Bar at the top of the page.

The PDB is a structure database that contains the three-dimensional crystal structure of macromolecules that are experimentally determined (Berman et al., 2000). These experimental methods are X-ray crystallography and NMR spectroscopy and nowadays cryo-electron microscopy is also used.