The World Wide Protein Data Bank (wwPDB)[1][2] is the internationally recognized sole repository of all published, empirically-determined atomic resolution macromolecular three-dimensional (3D) structure data. Founded in 1971 by Drs. Edgar Meyer and Walter Hamilton at Brookhaven National Laboratory[3], management of the Protein Data Bank was headed by Tom Koestle until 1994 and then by Joel L. Sussman till 1999, when it was transferred to members of the Research Collaboratory for Structural Bioinformatics (RCSB). Rutgers University is the lead site and is currently under the direction of Helen M. Berman. In 2008, it has three official branches: the Research Collaboratory for Structural Bioinformatics (USA), the European Bioinformatics Institute (UK), and the Protein Data Bank Japan.