The Sulfur Amino Acid Requirements of Turkey Poults

Abstract
Young turkey poults were fed rations containing an isolated soybean protein to which various additions of cystine and methionine were made. Approximately 0.5% methionine and 0.3% cystine were required for the optimum growth of the poults in a ration containing 24% crude protein. Methionine may completely replace cystine in the ration but cystine is not changed to methionine.