Atomic coordinate file: Difference between revisions

In February, 2019, the PDB announced that new depositions must be in the mmCIF format beginning July 1, 2019<ref name="endOfPDBFormat">[https://lists.sdsc.edu/pipermail/pdb-l/2019-February/006209.html Mandatory PDBx/mmCIF format files submission for MX depositions]: posted on the PDB email list Feb 20, 2019 by Jasmine Young, Biocuration Team Lead, RCSB PDB.</ref>. The PDB expects to retire PDB format files by 2021, in part because all 3-character ligand (chemical component identifier) codes will have been used<ref name="endOfPDBFormat" />. The PDB sometimes refers to the mmCIF format as "PDBx", which should not be confused with the original PDB format.