The Nutrition Information Centre of the
University of Stellenbosch (NICUS)
- Proteins primary function is the growth, repair and maintenance of body tissue
- The body requires new protein everyday in order to keep the body tissues healthy.
- In times of inadequate energy intake (either carbohydrate or lipids), proteins can also provide energy.
- Proteins consist of amino acid chains.
- Many amino acids linked together form a peptide, and many peptides linked together form a protein
- They provide non-essential (that can be produced by the body) and essential amino acids (that cannot be produced by the body).
Amino acids -> peptides -> proteins
- Proteins Performs various specific physiological roles in the body e.g. as part of blood, enzymes, some hormones, cell membranes and components of the immune system
- Sometimes used to provide energy