Warning
You are using a web browser that we do not support. Our website will not work properly. Please update to a newer version or download a new web browser, such as Chrome or Firefox.
Contact us
Toggle navigation
RCSB PDB
Deposit
Prepare Data
PDBx/mmCIF file
pdb_extract
SF-Tool
Ligand Expo
MAXIT
Validate Data
Validation Server
Validation API
Information for Journals
Validation Task Forces
Deposit Data
wwPDB OneDep System
PDB-Dev
Help and Resources
Deposit FAQ
Validation FAQ
Tutorials
Annotation Policies
Processing Procedures
PDBx/mmCIF Dictionary
Chemical Component Dictionary
Biologically Interesting Molecule Reference Dictionary (BIRD)
BioSync/Beamlines/Facilities
Related Tools
Search
Advanced Search
Sequence Similarity Search
Structure Similarity Search
Chemical Similarity Search
Chemical Sketch Tool
Browse by Annotations
New Entries
Unreleased Entries
PDB Statistics
Visualize
Mol* (MolStar)
Sequence Annotations Viewer
Genome View
Analyze
Pairwise Structure Alignment
Symmetry Resources in the PDB
Structure Quality
Grouping Structures
PDB Citation MeSH Network Explorer
PDB Statistics
EPPIC Biological Assemblies
External Data and Resources
Integrated Resources
Additional Resources
Download
Coordinates and Experimental Data
Sequences
Ligands
File Download Services
Web Services
Learn
Training Courses
Guide to PDB Data
Molecule of the Month
Educational Resources
Curricula
Browse
News
SciArt Galleries
Irving Geis
David Goodsell
About
Contact Us
About RCSB PDB
Vision and Mission
Citation, Usage, Privacy Policies, Logo
News
PDB History
PDB50
User Community
Publications
RCSB PDB Advisory Committee
Team Members
Diversity, Equity, Inclusion, and Access
Service Status
Documentation
General Help
3D Structures in the Protein Data Bank
Computed Structure Models (CSM)
Search and Browse
Basic Search
Advanced Search
Browse Annotations
Visualize and Analyze
Sequence Viewers
Pairwise Structure Alignment
Exploring a 3D Structure
Grouping Structures
Programmatic Access
Additional Resources
Software Supporters
Deposition Resources
FAQs
Glossary
Careers
COVID-19
219,140
Structures from the PDB
1,068,577
Computed Structure Models (CSM)
Navigation Tabs
Structure Summary
Structure
Annotations
Experiment
Sequence
Genome
Versions
Display Files
FASTA Sequence
mmCIF Format
mmCIF Format (Header)
PDB Format
PDB Format (Header)
Download Files
FASTA Sequence
PDBx/mmCIF Format
PDBx/mmCIF Format (gz)
BinaryCIF Format (gz)
PDB Format
PDB Format (gz)
PDBML/XML Format (gz)
Validation Full PDF
Validation (XML - gz)
Validation (CIF - gz)
Biological Assembly 1 (CIF - gz)
Biological Assembly 1 (PDB - gz)
225D
A TETRAMERIC DNA STRUCTURE WITH PROTONATED CYTOSINE:CYTOSINE BASE PAIRS
Help
Explore Sequence Annotations in 3D
About
About Us
Citing Us
Publications
Team
Careers
Usage & Privacy
Help
Contact Us
Documentation
Website FAQ
Glossary
Service Status
RCSB PDB (
citation
) is hosted by
RCSB PDB is a member of the
RCSB Partners
Nucleic Acid Knowledgebase
wwPDB Partners
RCSB PDB
PDBe
PDBj
BMRB
EMDB
