[3dem] Enhanced Collection of Starting Models

[Justin Flatt]

A new PDBx/mmCIF category, _pdbx_initial_refinement_model, has been 
introduced to improve information collected about starting models for 
X-ray, 3DEM, and NMR methods.

Experimentally derived vs computed models will be distinguished. 
Provenances of the resources where the starting model was obtained 
(e.g., PDB, AlphaFoldDB, RoseTTAFold, etc.) and its accession 
code/identifier will be captured, if publicly available.

Definition and example of this data category is available at 
https://urldefense.com/v3/__https://mmcif.wwpdb.org/dictionaries/mmcif_pdbx_v5_next.dic/Categories/pdbx_initial_refinement_model.html__;!!Mih3wA!FHMdTj39KDUX8SMfyxieDceeZQR6hxYWYK-U6MoRYzQH56ybpCIIl4Do0xFkJxJVVAgTOwse_O_1Q-W-HPSd9cZk$ .

_pdbx_initial_refinement_model.id

_pdbx_initial_refinement_model.entity_id_list

_pdbx_initial_refinement_model.type

_pdbx_initial_refinement_model.source_name

_pdbx_initial_refinement_model.accession_code

_pdbx_initial_refinement_model.details

wwPDB strongly recommends all PDB users and software developers to 
review code and adopt this for future applications.
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