A rare amino acid found in elastin, formed by condensation of four molecules of lysine into a pyridinium ring.

2-(4-Amino-4-carboxybutyl)-1-(5-amino-5-carboxypentyl)-3,5-bis(3-amino-3-carboxypropyl)pyridinium. A rare amino acid found in elastin, formed by condensation of four molecules of lysine into a pyridinium ring.

'Elastin' is a highly elastic protein in connective tissue that allows many tissues in the body to resume their shape after stretching or contracting, such as the skin, lungs, and blood vessels.

A salt-soluble precursor of elastin. Lysyl oxidase is instrumental in converting it to elastin in connective tissue.

Connective tissue comprised chiefly of elastic fibers. Elastic fibers have two components: ELASTIN and MICROFIBRILS.

Shiny, flexible bands of fibrous tissue connecting together articular extremities of bones. They are pliant, tough, and inextensile.

The span of viability of a tissue or an organ.

A pathological accumulation of air in tissues or organs.

An enzyme that catalyzes the hydrolysis of proteins, including elastin. It cleaves preferentially bonds at the carboxyl side of Ala and Val, with greater specificity for Ala. EC 3.4.21.37.

An enzyme oxidizing peptidyl-lysyl-peptide in the presence of water & molecular oxygen to yield peptidyl-allysyl-peptide plus ammonia & hydrogen peroxide. EC 1.4.3.13.