What is proteins?

Proteins are large biomolecules and macromolecules that comprise one or more long chains of amino acid residues. Proteins perform a vast array of functions within organisms, including catalyzing metabolic reactions, replicating DNA, responding to stimuli, and transporting molecules from one location to another. Proteins are fundamental components of living cells and are involved in virtually all biological processes. They are commonly used in food production, pharmaceuticals, and research.