Data Query, Reporting, and Access

View sigma-weighted 2m|Fo|-d|Fc| electron density "mini-maps" for bound ligands using the JSmol 3D View. This feature is available for ligands with more than one atom (ions excluded) in PDB entries with structure factor data. Different sigma values can be selected.

The feature can be accessed from an entry's Structure Summary page in the Small Molecule's section or from the bottom of the 3D View page.

Electron density mini-map for Thymidine-5'-Phosphate in PDB ID 3HW4 at sigma level 2. Electron density is only available for part of the ligand.	Retinoic Acid in PDB ID 1CBS at sigma level 1. In this example, the ligand fits well into the density.

Electron Density (JSmol) button from the Structure Summary page for PDB entry 1CBS.

Options to view different ligands and mini-maps and to change sigma levels appear under the JSmol viewer for PDB entry 1PRC.

RCSB PDB's Gene View illustrates the correspondences between the human genome and 3D structure. All human genes have been mapped to representative PDB protein chains (chosen from sequence clusters at 40% sequence identity) to show which regions of a gene are available in PDB coordinates.

Website/HTTP access to PDB data files is improving as RCSB PDB moves to a scalable, cloud-based service that will better support our growing user community. Access to this service via http://files.rcsb.org is not rate-limited or throttled for heavy users, and programmatic usage is encouraged.

This method is being used to deliver PDB entry data files (PDB and PDBx/mmCIF formats) from the Download Tool and from Structure Summary pages (Display and Download options). Data are returned faster and more reliably.

Display and download PDB data faster.