Collagen is a protein made up of amino-acids: glycine, proline, hydroxyproline, and arginine. The composition of collagen is considered unique given its high hydroxyproline content. If you lack the amino acids that combine to form collagen, your body's cells can't produce enough of it.Threonine is an essential amino acid for collagen production. Collagen is an important building block for the skin. It makes up to 30% of the protein of the living body and 70% of the protein that makes up skin.he building blocks that make up all proteins, including collagen, are called amino acids. An essential amino acid is one your body cannot make, so you have to get it from food or dietary supplements.
nodular opacity. 1. a solitary, round, circumscribed shadow found in the lung on chest radiograph; causes include granuloma, primary or metastatic carcinoma, benign tumor, vascular malformation. Stedmanâs Medical Dictionary Â© Wolters Kluwer Health.
any opacity of the lens is a cataract; the opacity arises from either denatured protein or imbibition of fluid by the lens. A condition in which the crystalline lens of the eye, or its capsul, or both, become opaque, with consequent loss of visual acuity.