PDB_help4 WebHelp 5.50 The PDB archive contains information about experimentally-determined structures of proteins, nucleic acids, and complex assemblies. As a member of the wwPDB, the RCSB PDB curates and annotates PDB data according to agreed upon standards. The RCSB PDB also provides a variety of tools and resources. Users can perform simple and advanced searches based on annotations r in Bookmarks Toolbar Folder > Pi Interactionswith 5.50interactionswebhelp