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>.
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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>.
==Roles in the body==
==Roles in the body==
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==Dietary Sources==
==Dietary Sources==
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Sufficient threonine is found in plant and animal protein sources, such as muscle meat, eggs, dairy protein (e.g., casein), cereal grains, and pulses (i.e., legumes).
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Sufficient threonine is found in plant and animal protein sources, such as muscle meat, eggs, dairy protein (e.g. casein), cereal grains, and pulses (i.e. legumes).