Jose Osorio

IntroductionAmino acids (AAs) are natural substances containing both amino and acid groups. Proline, which contains an imino group but not an amino group, is loosely considered as an AA in nutrition and metabolism.1 Protein (the polymer of AAs) is the major component of growth in animals and has been a focus of nutritional research over the past century.2 Proteinogenic (protein-creating) in animal ...