Improved Access to Chemical Component Definitions
Individual Chemical Component entries are available for download from the PDB Archive as individual files
Individual Chemical Component Dictionary (CCD) and Biologically Interest molecule Reference Dictionary (BIRD) definitions are now accessible in an FTP tree in the PDB archive. In response to user requests, these individual CCD and BIRD entry files can be found at /pdb/refdata/chem_comp/ and /pdb/refdata/bird/, respectively with last character hash as sub-directory.
Visit wwPDB.org for more information.