History
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| Version | Date | Type | |
| 1-0 | 1999-09-15 | Initial release | No files available. |
| 1-1 | 2012-09-05 | Database references, Derived calculations, Non-polymer description, Other, Structure summary, Version format compliance | No files available. |
| 1-2 | 2018-02-28 | Source and taxonomy | No files available. |
| 1-3 | 2024-05-01 | Data collection, Database references, Derived calculations, Refinement description |
