RCSB Protein Data Bank

PDB Structure Browser

Browse and visualize experimentally determined protein structures from the RCSB Protein Data Bank. Search by 4-character PDB accession code.

220K+
Total Structures
178K+
X-ray Structures
22K+
Cryo-EM Entries
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PDB IDs are 4-character alphanumeric codes (e.g., 1HHO, 6VXX). Structures are fetched directly from RCSB PDB.

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X-ray Crystallography

The most common method for determining protein structures at atomic resolution.

Cryo-EM

Electron microscopy at cryogenic temperatures, ideal for large complexes.

NMR Spectroscopy

Determines structures in solution, providing dynamic information.