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Table 2 Calculated and analyzed nutrient composition, g/kg, as is, of experimental diets fed to 10–20 days old broilers

From: Dietary supplementation with free methionine or methionine dipeptide mitigates intestinal oxidative stress induced by Eimeria spp. challenge in broiler chickens

Nutrients NSa dl-Met dl-MMet
Analyzed compositionb, g/kg
 Crude protein 217 220 216
 Lysine 12.87 (100)c 12.78 (100) 12.59 (100)
 Methionine 3.05 (24) 5.78 (45) 5.84 (46)
 Methionine + Cystine 6.53 (51) 9.10 (71) 9.17 (73)
 Threonine 8.54 (66) 8.73 (68) 8.41 (67)
 Tryptophan 2.81 (22) 2.85 (22) 2.79 (22)
 Valine 10.39 (81) 10.56 (83) 10.12 (80)
 Isoleucine 9.56 (74) 9.75 (76) 9.27 (74)
 Arginine 14.52 (113) 14.89 (117) 14.34 (114)
Calculated composition
 AMEd, kcal/kg 3053 3052 3052
 Calcium, g/kg 8.76 8.76 8.76
 Available phosphorus, g/kg 4.50 4.50 4.50
 Sodium, g/kg 2.00 2.00 2.00
  1. aNS Non-supplemented diet (control diet), dl-Met diet supplemented with dl-methionine 99%, dl-MMet diet supplemented with dl-methionyl-dl-methionine 95%
  2. bFeeds were formulated using the total amino acid contents of corn and soybean meal determined by near infrared reflectance spectroscopy. The total amino acid and other nutrient values are shown as gram per kilogram and not as a percentage of the diets. Total amino acid compositions were analytically determined by Evonik Industries (Hanau, Germany) using wet chemistry (high-performance liquid chromatography)
  3. cValues in parentheses indicate the amino acid-to-lysine ratios (ideal protein concept)
  4. dAME Apparent metabolizable energy