RCSB PDB: Search 3D structures in RCSB.org database, including experimental entries and Computed Structure Models.

AlphaFold DB: Search 3D structures in AlphaFold DB.

Chain: Use a PDB chain as a query for the search.

Assembly: Use a PDB assembly as a query for the search.

PDB ID: 4-letters code of a PDB entry.

Chain: Instance identifier for the PDB chain defined as the mmcif term label_asym_id.

Assembly: Assembly identifier defined as the mmcif term _pdbx_struct_assembly.id.

Chains: Returns PDB chains.

Assemblies: Returns PDB assemblies.

CSM: Include RCSB.org Computed Structure Models in the search results

# results: Number of returned search results.

Local: Uses unmodified scores from the embedding model. Local structure similarity may rank higher.

Global: Scores are scaled based on the relationship between the number of residues, using the factor: min(query_length, target_length) / max(query_length, target_length).

Switch to upload form: Use a coordinates file as a query for the search.

Format: Select the coordinates file format (.pdb, .cif, or .bcif).

Chain ID: Use a specif chain of the structure (optional). If not present all chains are used.