L-Lysine HCl 98.5% Feed Grade, L-Threonine 98.5% Feed Grade, L-Tryptophan Feed Grade manufacturer / supplier in China, offering 98.5% L-Threonine CAS 72-19-5, Hot Sell Yellow Corn Gluten Meal 60% Protein Feed Additives, China Factory Brand L-Isoleucine and so on.