Collagen amino acids, functional role

Proteins are extraordinarily versatile molecules. They are found within cells and in extracellular locations. They may serve structural roles, as in collagen, or they may be functional as in enzymes, transporters, muscles, hormones, and receptors. Proteins are synthesized as linear polymers of 19 amino acids and one imino acid (commonly referred to slightly inaccurately as 20 amino acids). After synthesis of the initial polymer, or polypeptide, the protein may be ready for its function, or additional chemical modification of the structure may occur. In virtually all cases, specific folding of the protein into a fixed three-dimensional structure is also required. Proteins, together with RNA and polysaccharides, play a major role in their own synthesis, modification, and folding. 

FUNCTIONS. The specific biochemical functions of vitamin C are not clearly understood. Nevertheless, it is established as a very important substance for body welfare because of being implicated in the following roles (1) formation and maintenance of collagen, which makes for more rapid and sound healing of wounds and burns (2) metabolism of the amino acids tyrosine and tryptophan (3) absorption and movement of iron (4) metabolism of fats and lipids, and cholesterol control (5) as an antioxidant in the protection of vitamins A and E and the polyunsaturated fatty acids (6) sound teeth and bones (7) strong capillary walls and healthy blood vessels (8) metabolism of folic acid and perhaps in a number of other roles. Details follow ... 

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