1S1O

NMR Structure of a D,L Alternating pentadecamer of norleucine: double antiparallel beta-helix

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	2004-02-24	Initial release
1.1	2008-04-29		Version format compliance
1.2	2011-07-13		Version format compliance
1.3	2012-09-19		Non-polymer description, Structure summary
1.4	2012-12-12		Other
1.5	2022-02-09		Data collection, Database references, Derived calculations	database_2, pdbx_nmr_software, struct_conn, struct_ref_seq	Download
2.0	2023-11-15		Atomic model, Data collection, Derived calculations	atom_site, chem_comp_atom, chem_comp_bond, struct_conn	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 R01GM133198.