1SI9

Boiling stable protein isolated from Populus tremula

Changes made to a PDB entry after its initial release are considered to be either “major” or “minor”. The latest minor version of each major version is available as a file download. More information about the PDB versioning is available.

Version Number	Version Date	Version Type/Reason	Version Change	Revised CIF Category
1.0	2004-09-21	Initial release
1.1	2008-04-29		Version format compliance
1.2	2011-07-13		Advisory, Derived calculations, Refinement description, Version format compliance
1.3	2024-02-14		Data collection, Database references, Derived calculations, Refinement description	chem_comp_atom, chem_comp_bond, database_2, pdbx_struct_special_symmetry, struct_ncs_dom_lim, struct_site	Download

RCSB PDB Core Operations are funded by the U.S. National Science Foundation (DBI-2321666), the US Department of Energy (DE-SC0019749), and the National Cancer Institute, National Institute of Allergy and Infectious Diseases, and National Institute of General Medical Sciences of the National Institutes of Health under grant R01GM157729.