Table 2 Contents of free amino acids (g/kg, dry basis) in muscle of bighead carp (Aristichthys nobilis)

Asp

0.4 ± 0.0^a

0.5 ± 0.0^b

1.7 ± 0.0^c

1.7 ± 0.0^d

Glu

63.5 ± 0.4^a

62.7 ± 0.1^b

66.5 ± 0.2^c

64.5 ± 0.4^d

Gly

7.0 ± 0.1^a

7.6 ± 0.4^ab

7.4 ± 0.3^ab

7.7 ± 0.1^b

Ala

9.3 ± 0.3

9.7 ± 0.4

9.6 ± 0.5

9.8 ± 0.2

Arg

12.8 ± 0.6

13.0 ± 0.2

12.8 ± 0.8

13.2 ± 0.6

His

4.7 ± 0.0^a

5.1 ± 0.0^b

0.8 ± 0.0^c

0.9 ± 0.0^d

Pro

16.7 ± 0.3^a

17.8 ± 0.0^b

22.5 ± 0.1^c

22.4 ± 0.3^c

Ser

6.8 ± 0.3

6.5 ± 0.2

6.7 ± 0.1

6.6 ± 0.2

Ile

9.8 ± 0.3

9.7 ± 0.4

9.6 ± 0.3

9.7 ± 0.2

Leu

13.2 ± 0.5

13.5 ± 0.5

13.2 ± 0.3

13.7 ± 0.3

Lys

13.7 ± 0.2^a

14.5 ± 0.6^ab

14.5 ± 0.7^ab

15.1 ± 0.5^b

Met

5.0 ± 0.4

5.7 ± 0.1

5.2 ± 0.1

5.5 ± 0.3

Cys

16.8 ± 0.2

16.6 ± 0.2

16.5 ± 0.1

16.7 ± 0.2

Phe

6.9 ± 0.3

7.2 ± 0.2

7.0 ± 0.3

7.2 ± 0.2

Tyr

6.0 ± 0.2

6.1 ± 0.2

6.0 ± 0.1

6.3 ± 0.1

Thr

6.1 ± 0.2^a

6.1 ± 0.0^a

6.1 ± 0.1^ab

6.4 ± 0.1^b

Val

6.5 ± 0.6

6.5 ± 0.2

6.4 ± 0.2

6.8 ± 0.3

Total

205.7 ± 2.5^a

210.7 ± 2.1^ab

215.5 ± 3.4^bc

218.3 ± 2.1^c