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The evolution of experimental methods, functional knowledge of proteins, and methods used to process PDB data has introduced inconsistencies into the archive. The wwPDB has remediated these data to create a more uniform archive.
The results of these efforts can be found in the remediated coordinate files. Highlights include:
| Sequence | Updated references to databases and taxonomies
Resolved differences between chemical and macromolecular sequences |
| Citation | Verified and updated primary citation assignments |
| Assembly and virus Information | Improved representation of deposited and experimental coordinate frames, symmetry, and frame transformations |
| Nucleic acid labeling | Deoxy and ribose nucleotides assigned separate chemical definitions. The DNA forms are relabeled as DA, DC, DG, DT, and DI. RNA forms remain labeled as A, G, C, U, I. |
| Beamline data | Beamline and synchrotron facility names have been made consistent with BioSync |
| Chemical components | Standardization of chemistry and nomenclature in monomers and ligands |
The full scope of the remediation project is available in the overview (PDF).