2ZQ8

Apo structure of class a beta-lactamase Toho-1 R274N/R276N double mutant

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	2009-07-28	Initial release
1.1	2011-07-13		Version format compliance
1.2	2021-11-10		Database references, Derived calculations	database_2, pdbx_struct_special_symmetry, struct_ref_seq_dif, struct_site
1.3	2023-11-01		Data collection, Refinement description	chem_comp_atom, chem_comp_bond, pdbx_initial_refinement_model	Download

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