In details


Amino Acid: Molecular Structure

What is (definition)

Protein is a macromolecule composed basically of linear chains of amino acids.

There are simple proteins, composed only of amino acids and their derivatives. And also the conjugated proteins (heteroproteins), which are formed by polypeptide chains and prosthetic group (components of non-protein nature).

Protein Functions

They play a very important role in our body as they provide material for both the construction and maintenance of all our organs and tissues.

The proteins may be of plant or animal origin. In the case of the former, they are considered incomplete because they are poor in the variety of essential amino acids (those that the body is unable to produce). Already the protein of animal origin, is considered complete because it contains all the essential amino acids.


As mentioned earlier, proteins are of utmost importance to our body for their constructive and restorative function. They also participate in the formation of hormones, enzymes and antibodies. With these few examples, one can already have an idea of ​​how indispensable they are to our body.

When we eat protein, it is broken down during the digestion process and then absorbed by our cells, which again break it down to amino acids. These amino acids will be used by our body wherever they are most needed.

For example, if a person's skin is unbalanced by a lack of amino acids, protein-rich foods and proper water intake will be beneficial to their recovery. This is true not only for the skin, but for the whole body, because, as we have seen, amino acids are builders and repairers.