Protein

Protein (Tuna Cakes)

Proteins are another of the biological molecules and are the most complex out of all. They "are of great nutritional value and are directly involved in the chemical processes essential for life". Although they are present in all living organisms, each species has protein types of their own. They also vary per organ, meaning each organ also has protein types of their own. Proteins are structured by large, varied chains of amino acid composition and sequences.