ABSTRACT
Amino acid insufficiency can be corrected in at least three ways, namely by addition with synthetic amino acids, supplementation with small amounts of proteins which are a rich source of the deficient amino acid(s), or complementation with other protein(s), so that the combined protein sources will balance each other’s deficiencies or excesses. The U.S. animal feed industry, annually spends between 70 and 150 million dollars on synthetic Met and Lys, respectively, to supplement the protein base feeds [5].
