Journal of Food Quality

Research Article

Species Variations in the Proximate Composition, Amino Acid Profile, and Protein Quality of the Muscle Tissue of Grass Carp, Bighead Carp, Siberian Sturgeon, and Wels Catfish

Table 3

Amino acid profile of protein of grass carp, bighead carp, Siberian sturgeon, and wels catfish (mean value ± SD).


Amino acid (g/100 g protein)	Grass carp ()	Bighead carp ()	Siberian sturgeon ()	Wels catfish ()	Standard

Isoleucine (Ile)	4.28^a ± 0.08	4.24^a ± 0.11	4.33^a ± 0.09	4.35^a ± 0.11	3.0
Leucine (Leu)	7.81^a ± 0.10	7.89^ab ± 0.15	7.97^b ± 0.13	7.98^b ± 0.10	6.1
Lysine (Lys)	9.83^a ± 0.11	9.69^a ± 0.17	10.02^b ± 0.17	9.71^a ± 0.07	4.8
Methionine (Met)	2.77^a ± 0.22	2.30^bc ± 0.19	2.44^b ± 0.41	2.05^c ± 0.13	2.3¹
Cysteine (Cys)	0.37^a ± 0.04	0.24^b ± 0.05	0.23^b ± 0.05	0.20^b ± 0.04
Phenylalanine (Phe)	3.97^a ± 0.13	4.02^ab ± 0.06	4.25^c ± 0.06	4.10^b ± 0.05	4.1²
Tyrosine (Tyr)	3.26^a ± 0.12	3.35^a ± 0.09	3.57^b ± 0.06	3.26^a ± 0.08
Threonine (Thr)	4.75^ab ± 0.05	4.71^a ± 0.11	4.86^b ± 0.13	5.15^c ± 0.11	2.5
Tryptophan (Try)	3.02^a ± 0.41	3.04^a ± 0.52	1.80^b ± 0.33	1.98^b ± 0.15	0.66
Valine (Val)	4.91^a ± 0.06	4.93^a ± 0.11	4.85^a ± 0.10	4.74^b ± 0.08	4.0
Histidine (His)	2.69^a ± 0.09	2.67^a ± 0.09	3.29^b ± 0.13	2.34^c ± 0.02	1.6
TEAA	47.64^a	47.08^a	47.62^a	45.86^b	29.06
Aspartic acid (Asp)	10.30 ± 0.10	10.28 ± 0.17	10.20 ± 0.18	10.52 ± 0.17
Arginine (Arg)	6.59 ± 0.18	6.63 ± 0.13	6.66 ± 0.09	6.63 ± 0.13
Serine (Ser)	4.17 ± 0.03	4.21 ± 0.07	4.49 ± 0.06	4.26 ± 0.07
Glutamic acid (Glu)	15.06 ± 0.23	15.11 ± 0.73	14.91 ± 0.26	15.98 ± 0.15
Proline (Pro)	4.70 ± 0.21	4.81 ± 0.26	4.80 ± 0.26	5.16 ± 0.22
Glycine (Gly)	5.45 ± 0.32	5.67 ± 0.18	5.21 ± 0.29	5.43 ± 0.32
Alanine (Ala)	6.09 ± 0.06	6.20 ± 0.07	6.10 ± 0.10	6.16 ± 0.07
NEAA	52.36^a	52.92^a	52.38^a	54.14^b
TSAA	3.14^a	2.53^bc	2.67^b	2.25^c
TArAA	7.23^a	7.37^a	7.81^b	7.36^a

Mean values in rows marked with different letters differ significantly at . Recommended amino acid scoring pattern for adult. ¹Met + Cys. ²Phe + Tyr. TEAA: total essential amino acids; NEAA: nonessential amino acids; TSAA: total sulphur amino acids; TArAA: total aromatic amino acids.