2IPK

Crystal Structure of the MHC Class II Molecule HLA-DR1 in Complex with the Fluorogenic Peptide, AcPKXVKQNTLKLAT (X=3-[5-(dimethylamino)-1,3-dioxo-1,3-dihydro-2H-isoindol-2-yl]-L-alanine) and the Superantigen, SEC3 Variant 3B2

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	2007-03-13	Initial release
1.1	2008-05-01		Version format compliance
1.2	2011-07-13		Version format compliance
1.3	2017-10-18		Refinement description, Source and taxonomy	pdbx_entity_src_syn, software
1.4	2021-10-20		Database references, Derived calculations	database_2, struct_conn, struct_ref_seq_dif
1.5	2023-08-30		Data collection, Refinement description	chem_comp_atom, chem_comp_bond, pdbx_initial_refinement_model	Download

RCSB PDB Core Operations are funded by the National Science Foundation (DBI-1832184), 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 R01GM133198.