Influences of dietary protein sources and crude protein levels on intracellular free amino acid profile in the longissimus dorsi muscle of finishing gilts

Table 5 Effect of dietary crude protein source and level on intracellular free amino acid profile in the longissimus dorsi muscle of finishing gilts (90–113 kg, n = 6), μg/g

Item	Protein source		Protein level		SEM	P
Item	Cottonseed meal	Soybean meal	12 %	14 %	SEM	Source	Level	Source × Level
Arginine	19.36	18.50	18.76	19.10	0.85	0.50	0.79	0.70
Histidine	84.49	84.66	84.69	84.46	1.43	0.93	0.91	0.79
Isoleucine	8.94	9.30	8.80	9.44	0.43	0.57	0.31	0.44
Leucine	15.70	15.03	16.07	14.67	0.52	0.71	0.09	0.24
Lysine	20.76	19.51	21.93	18.34	0.93	0.38	0.02	0.28
Methionine	5.26	5.51	5.73	5.05	0.18	0.34	0.02	0.44
Phenylalanine	10.94	11.03	11.33	10.64	0.28	0.84	0.11	0.48
Threonine	9.24	9.56	9.81	8.99	0.51	0.67	0.27	0.32
Tryptophan	2.92	3.02	2.82	3.12	0.12	0.58	0.09	0.48
Valine	14.05	12.36	13.15	13.26	0.49	0.03	0.88	<0.01
Alanine	158.09	165.34	161.15	162.48	6.40	0.42	0.89	0.21
Asparagine	5.37	5.13	5.58	4.92	0.31	0.59	0.15	0.35
Cysteine	0.61	0.29	0.58	0.33	0.12	0.08	0.12	0.53
γ-aminobutyric acid	0.36	0.36	0.37	0.36	0.01	0.99	0.50	0.66
Glutamate	12.11	13.63	12.31	13.43	1.03	0.31	0.45	0.82
Glutamine	92.04	83.21	100.73	74.53	10.01	0.52	0.08	0.56
Glycine	38.21	43.12	42.79	38.55	2.42	0.17	0.23	0.34
Proline	13.06	12.93	13.19	12.80	0.43	0.84	0.53	0.41
Serine	11.56	10.02	11.62	9.95	0.60	0.09	0.07	0.27
Tyrosine	11.11	10.77	10.97	10.90	0.46	0.62	0.95	0.70
Sulfur-containing amino acids^a	5.87	5.80	6.30	5.37	0.23	0.84	0.01	0.78
Total amino acids	534.21	533.49	552.39	515.31	13.23	0.84	0.01	0.78