Domain

Structures: SLC41 divalent cation transporters, integral membrane domain (IPR006667)

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.

2yvx  2zy9 

CATH

CATH is a hierarchical classification of protein model structures.

1.10.357.20 

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.

f.57.1.1