1. Garson K. Law, Robert F. Bertolo, Alfred Adjiri-Awere, Paul B. Pencharz, and Ronald O. Ball. Adequate oral threonine is critical for mucin production and gut function in neonatal piglets. May 1 2007, AJP – Gastrointestinal and Liver Physiology, Vol. 292 (5), G1293- G1301.

2. Sudhir Borgonha, Meredith M Regan, Seung-Ho Oh, Mervelina Condon and Vernon R Young. Threonine requirement of healthy adults, derived with a 24-h indicator amino acid balance technique. April 2002, American Journal of Clinical Nutrition. Vol. 75 (4), 698-704.

3. Xu Wang, Shiyan Qiao, Yulong Yin, Longyao Yue, Zongyi Wang and Guoyao Wu. A Deficiency or Excess of Dietary Threonine Reduces Protein Synthesis in Jejunum and Skeletal Muscle of Young Pigs. June 2007, The Journal of Nutrition. Vol. 137, 1442 – 1446.

4. Threonine content in food. USDA National Nutrient Database for Standard Reference, Release 19 (2006).