Domain

Structures: D-aminopeptidase, domain B/C (IPR009090)

PDBe

The Protein Data Bank (PDB) is a repository for the 3-D structural data of large biological molecules, such as proteins and nucleic acids.

1ei5 

CATH

CATH is a hierarchical classification of protein model structures.

2.40.128.50 

SCOP

The Structural Classification of Proteins (SCOP) database is a largely manual classification of protein structural domains based on similarities of their amino acid sequences and three-dimensional structures.

b.61.3.1