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04/08 

Folding of Protein Domains

Proteins are polymers of amino acids. The secondary structure elements are beta sheets, alpha helices and loops. These elements are arranged in 3D space creating the environment for the protein or protein domain to fulfill its function.

As more and more 3D shapes became known, researchers noticed patterns in the folding of whole proteins or protein domains.

Visit PDB-101 to download a poster highlighting common arrangements of secondary structure elements in protein domains as defined using the CATH classification scheme.

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