Repeat

Structures: Thrombospondin, type 1 repeat (IPR000884)

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.

1lsl  1szl 

CATH

CATH is a hierarchical classification of protein model structures.

2.20.100.10 

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.

g.60.1.1