Structural proteins

Catenins are a family of proteins found in complexes with cadherin cell adhesion molecules of animal cells.

Collagen /ˈkɒlədʒᵻn/ is the main structural protein in the extracellular space in the various connective tissues in animal bodies.

Actin is a family of globular multi-functional proteins that form microfilaments.

Gelatin or gelatine (from Latin: gelatus meaning "stiff", "frozen") is a translucent, colorless, brittle (when dry), flavorless food derived from collagen obtained from various animal raw materials.

Elastin is a highly elastic protein in connective tissue and allows many tissues in the body to resume their shape after stretching or contracting.

(Not to be confused with Titan, Tintin, or Titian.) Titin /ˈtaɪtɪn/, also known as connectin, is a protein that, in humans, is encoded by the TTN gene.

In anatomy, a crystallin is a water-soluble structural protein found in the lens and the cornea of the eye accounting for the transparency of the structure.

Claudins are a family of proteins that are the most important components of the tight junctions, where they establish the paracellular barrier that controls the flow of molecules in the intercellular space between the cells of an epithelium.

Nuclear lamins, also known as Class V intermediate filaments, are fibrous proteins providing structural function and transcriptional regulation in the cell nucleus.

Elastic fibers (or yellow fibers) are bundles of proteins (elastin) found in extracellular matrix of connective tissue and produced by fibroblasts and smooth muscle cells in arteries.

Fibrillin is a glycoprotein, which is essential for the formation of elastic fibers found in connective tissue.

The ERM protein family consists of three closely related proteins, ezrin, radixin and moesin.

Influenza virus nucleoprotein (NP) is a structural protein which encapsidates the negative strand viral RNA.