Is the Cystine Content of the Diet of Concern for Broilers from 0 to 21 Days of Age?

National Research Council, 1994 “Cys” is the approved abbreviation for cysteine, but since there is no abbreviation for cystine, this manuscript will use the abbreviation “Cys” for cystine. National Research Council, 1971 National Research Council, 1977 National Research Council, 1984 Almquist, 1952, Amino acid requirement of chickens and turkeys: A review, Poultry Sci., 31, 966, 10.3382/ps.0310966 Kalin, 1960, The amino acid requirement of the growing chick fed a crystalline amino acid diet, Poultry Sci., 39, 39, 10.3382/ps.0390039 Dean, 1965, The development of an amino acid reference diet for the early growth of chicks, Poultry Sci., 44, 803, 10.3382/ps.0440803 Graber, 1971, Sulfur amino acid nutrition of the growing chick: Effect of age on the dietary Met requirement, Poultry Sci., 50, 854, 10.3382/ps.0500854 Graber, 1971, Sulfur amino acid nutrition of the growing chick: Quantitative aspects concerning the efficacy of dietary Met, cysteine, and cystine, J. Anim. Sci., 33, 1005, 10.2527/jas1971.3351005x Quillen, 1961, Effect of choline on the methionine requirements of broiler chickens, Poultry Sci., 40, 639, 10.3382/ps.0400639 Pesti, 1979, Sulfur amino acid and methyl donor status of corn-soy diets fed to starting broiler chicks and turkey poults, Poultry Sci., 58, 1541, 10.3382/ps.0581541 Gordon, 1955, Ability of sodium sulfate to stimulate growth of the chicken, Science, 122, 1270, 10.1126/science.122.3183.1270 Ross, 1970, The response of chicks to sodium sulfate supplementation of a corn-soy diet, Poultry Sci., 49, 1605, 10.3382/ps.0491605 Haplin, 1984, Selenium deficiency and transsulfuration in the chick, J. Nutr., 114, 606, 10.1093/jn/114.3.606 Baker, D.H. and K.R. Robins, 1979. Sulfur amino acid utilization in chicks fed supplemental monensin and copper. Page 39 in: Proc. Maryland Nutr. Conf. for Feed Manufacturers, College Park, MD. Sasse, 1973, Modification of the Illinois reference standard amino acid mixture, Poultry Sci., 52, 1970, 10.3382/ps.0521970 Sasse, 1974, Sulfur utilization by the chick with emphasis on the effect of inorganic sulfate on the cystine-methionine interrelationship, J. Nutr., 104, 244, 10.1093/jn/104.2.244 Baker, 1996, Sulfur amino acid requirement and cystine replacement value of broiler chicks during the period three to six weeks posthatching, Poultry Sci., 75, 737, 10.3382/ps.0750737 SAS Institute, 1988 Duncan, 1955, Multiple range and multiple F tests, Biometrics, 1, 1, 10.2307/3001478