− | Threonine is a '''component of structural proteins'''. The hydroxyl group on the side chain of threonine often serves as the site for phosphorylation and de-phosphorylation reactions that control the activities of many proteins and enzymes<ref>National Research Council (NRC). Protein and Amino Acids. In Nutrient Requirements for Dogs and Cats. 2006 Washington, DC: National Academies Press p. 130-131.</ref>. | + | Threonine is a '''component of structural [[Protein Overview - Nutrition|proteins]]'''. The hydroxyl group on the side chain of threonine often serves as the site for phosphorylation and de-phosphorylation reactions that control the activities of many proteins and enzymes<ref>National Research Council (NRC). Protein and Amino Acids. In Nutrient Requirements for Dogs and Cats. 2006 Washington, DC: National Academies Press p. 130-131.</ref>. |