title: Availability of oxidized sulfur amino acids for the growing chick.
abstract: In four trials, experimental diets were fed to one week old broiler cockerels for a period of 14 days to compare the availability of oxidized sulfur amino acids to DL-methionine on an equimolar basis. The data were analyzed by the slope-ratio technique. Chick weight gain per unit feed consumed was the dependent variable and dietary level of supplemental amino acid was the independent variable. There was no significant (P=.05) differences in availability of DL-, L-, and D-methionine. D-, DL-, and L-methionine sulfoxide were 52, 59 and 77%, respectively, as available as DL-methionine. The differences in availability between the three sulfoxides and DL-methionine were significant. Both DL- and D-methionine sulfoxide were significantly less available than L-methionine sulfoxide. No response was obtained from L-cysteic acid or DL-methionine sulfone.
mesh_terms: D000603:Amino Acids, Sulfur / Q000378:metabolism*; D000821:Animal Feed; D000818:Animals; D002645:Chickens / Q000254:growth & development / Q000378:metabolism*; D003544:Cysteic Acid / Q000378:metabolism; D008297:Male; D008715:Methionine / Q000378:metabolism; D010084:Oxidation-Reduction; D013450:Sulfones / Q000378:metabolism; D013454:Sulfoxides / Q000378:metabolism
chemical_list: D000603:Amino Acids, Sulfur; D013450:Sulfones; D013454:Sulfoxides; D003544:Cysteic Acid; D008715:Methionine