Protein

Definition

Proteins are large, complex molecules made up of amino acids that perform a vast array of functions in the body, including structural support, catalyzing metabolic reactions, and regulating genes. They are essential components of the muscles, skin, enzymes, and hormones.

Related terms

Amino acids: The building blocks of proteins, consisting of a basic amino group, an acidic carboxyl group, and a unique side chain.

Enzymes:

Proteins that act as biological catalysts to speed up chemical reactions in cells without being consumed by the reaction.

Hormones:

Chemical messengers that are produced in one part of the body but affect other parts, many of which are proteins like insulin