Files in its holdings are deposited by the international user community and maintained by the RCSB PDB staff. Approximately 50-100 new structures are deposited each week. They are annotated by RCSB and released upon the depositor's specifications. PDB data is freely available worldwide. A search requires that at least one search field is filled.
Case is ignored.
The search is then executed by pressing the search button. A search can return a single structure or multiple structures. Iterative searches can be performed, using the output from one search as input for the next. Answers to frequently asked questions are available in the examples below. The PDB is a historical archive.