Table 4 Effects of methionine on the activities of trypsin, lipase and amylase in the intestine, Na⁺/K⁺-ATPase, alkaline phosphatase (AKP), γ-glutamyl transpeptidase (γ-GT) and creatine kinase (CK) in the proximal intestine (PI), mid intestine (MI) and distal intestine (DI) of sub-adult grass carp¹

170.42 ± 8.13^a

235.75 ± 7.31^b

298.06 ± 5.53^e

275.83 ± 5.93^d

265.32 ± 9.89^c

26.92 ± 1.58^a

28.54 ± 2.21^a

44.78 ± 4.82^b

28.54 ± 2.59^a

29.31 ± 3.12^a

1.78 ± 0.09^a

1.95 ± 0.08^b

1.90 ± 0.06^b

1.88 ± 0.09^b

1.90 ± 0.03^b

0.56 ± 0.03^ab

0.56 ± 0.04^ab

0.66 ± 0.06^c

0.62 ± 0.04^bc

0.74 ± 0.09^d

0.52 ± 0.04^bc

0.55 ± 0.05^bcd

0.56 ± 0.04^cd

0.59 ± 0.05^d

0.50 ± 0.04^b

0.41 ± 0.03^a

0.43 ± 0.04^ab

0.47 ± 0.05^b

0.40 ± 0.04^a

0.40 ± 0.04^a

95.50 ± 10.36^a

114.14 ± 8.49^b

187.58 ± 20.75^e

167.47 ± 13.52^d

167.87 ± 14.96^d

37.84 ± 4.02^a

51.76 ± 5.44^b

52.45 ± 4.17^b

75.72 ± 7.24^c

71.65 ± 7.42^c

43.89 ± 2.68^a

46.89 ± 2.70^ab

48.87 ± 2.51^bc

59.24 ± 3.37^d

51.74 ± 3.38^c

3.62 ± 0.18^a

8.55 ± 0.28^e

6.83 ± 0.36^d

5.89 ± 0.36^c

5.92 ± 0.24^c

5.01 ± 0.39^a

7.01 ± 0.22^c

7.07 ± 0.40^c

5.62 ± 0.32^b

5.56 ± 0.22^b

0.52 ± 0.04^a

1.69 ± 0.14^b

2.07 ± 0.13^c

2.21 ± 0.17^c

2.19 ± 0.13^c

1.91 ± 0.21^a

2.28 ± 0.19^b

3.75 ± 0.25^d

3.63 ± 0.37^cd

3.41 ± 0.37^c

1.65 ± 0.13^e

1.46 ± 0.14^d

0.91 ± 0.09^c

0.71 ± 0.05^b

0.54 ± 0.04^a

3.43 ± 0.18

3.36 ± 0.27

3.37 ± 0.17

3.24 ± 0.36

3.29 ± 0.34