Table 5. Amino acids composition in whole-body of juvenile Pacific white shrimp (Penaeus vannamei) fed the experimental diets for 8 weeks (% of protein)

AAs	Dietary valine levels (g/kg)
AAs	2.7	5.1	8.7	12.1	16.0
EAA
Valine	2.57 ± 0.02^b	2.83 ± 0.03^a	2.75 ± 0.02^a	2.74 ± 0.08^a	2.78 ± 0.08^a
Isoleucine	2.36 ± 0.07	2.55 ± 0.01	2.47 ± 0.06	2.45 ± 0.07	2.52 ± 0.14
Leucine	4.16 ± 0.13	4.38 ± 0.11	4.27 ± 0.08	4.26 ± 0.09	4.38 ± 0.26
Histidine	3.31 ± 0.14	3.87 ± 0.43	4.02 ± 0.16	4.14 ± 0.39	4.49 ± 0.36
Lysine	4.62 ± 0.23	4.63 ± 0.09	4.40 ± 0.34	4.81 ± 0.47	4.97 ± 0.68
Phenylalanine	2.57 ± 0.08^b	2.82 ± 0.01^a	2.77 ± 0.11^a	2.73 ± 0.06^ab	2.79 ± 0.01^a
Threonine	2.24 ± 0.05^b	2.25 ± 0.08^ab	2.49 ± 0.08^a	2.42 ± 0.08^ab	2.38 ± 0.14^ab
Arginine	5.65 ± 0.25	6.63 ± 0.06	5.53 ± 1.12	6.14 ± 1.40	6.91 ± 0.25
NEAA
Glycine	6.01 ± 0.26^bc	6.50 ± 0.30^ab	5.60 ± 0.06^c	6.22 ± 0.11^b	6.83 ± 0.16^a
Alanine	3.88 ± 0.08	4.19 ± 0.01	4.09 ± 0.12	4.03 ± 0.34	4.04 ± 0.16
Aspartic acid	6.34 ± 0.54	6.77 ± 0.65	7.08 ± 0.14	6.61 ± 0.23	6.74 ± 0.11
Glutamic acid	9.56 ± 0.47	9.41 ± 0.21	9.75 ± 0.10	10.0 ± 0.01	9.81 ± 0.39
Proline	3.56 ± 0.34	3.43 ± 0.89	3.81 ± 0.42	4.10 ± 0.25	3.46 ± 0.64
Serine	2.45 ± 0.12	2.49 ± 0.05	2.56 ± 0.04	2.59 ± 0.06	2.62 ± 0.03
Tyrosine	1.97 ± .014	2.25 ± 0.06	1.97 ± 0.16	2.06 ± 0.21	2.13 ± 0.25

The experimental diets were added with valine by 2.7, 5.1, 8.7, 12.1 or 16.0 g/kg diet.
Values are mean of duplicates (n = 2).
Different superscripts in the same column are significantly different (p < 0.05).
EAA, essential amino acids; NEAA, non-essential amino acids.