. 2018 Jul 10;96(8):3221–3232. doi: 10.1093/jas/sky116

Table 6.

Effect of low-protein diet on free AA profile (μg/100 mg) of longissimus dorsi muscle in growing and finishing pig

Item^a	Growing pig, dietary treatment^b				Finishing pig, dietary treatment				P value
Item^a	NP	LP	VLP	SEM	NP	LP	VLP	SEM	Growing	Finishing
Essential AA, μg/100 mg
Histidine	0.99^a	0.81^b	0.81^b	0.05	1.19	1.01	1.07	0.09	0.034	0.433
Isoleucine	1.33^a	1.08^b	1.05^b	0.06	1.24^a	0.97^b	1.02^b	0.07	0.012	0.022
Leucine	2.21^a	2.14^ab	1.85^b	0.11	1.84	1.77	1.64	0.14	0.087	0.630
Lysine	2.47^b	3.36^ab	3.95^a	0.42	1.14^b	1.27^b	2.63^a	0.31	0.073	0.008
Methionine	1.42^b	1.44^b	1.82^a	0.10	1.25^b	1.36^b	2.00^a	0.14	0.037	<0.01
Phenylalanine	1.76^a	1.84^a	1.39^b	0.11	1.61	1.40	1.63	0.14	0.018	0.434
Threonine	1.39^b	1.72^ab	1.95^a	0.14	1.35^b	1.39^b	1.82^a	0.13	0.044	0.032
Tryptophan	0.47	0.44	0.45	0.03	0.49	0.53	0.65	0.07	0.711	0.264
Valine	1.98^a	1.34^b	1.35^b	0.14	1.93^a	1.61^ab	1.48^b	0.13	0.007	0.080
Non-essential AA, μg/100 mg
Alanine	12.32^b	11.99^b	15.01^a	0.62	9.34^b	10.25^b	12.16^a	0.52	0.014	<0.01
Arginine	2.91^a	2.40^ab	2.16^b	0.22	1.90	1.52	1.71	0.14	0.069	0.211
Asparagine	0.89	0.69	0.95	0.14	0.65	0.58	0.81	0.09	0.387	0.158
Aspartic acid	0.54	0.57	0.52	0.08	0.60	0.55	0.59	0.08	0.921	0.866
Glutamic acid	2.85^b	3.42^ab	3.79^a	0.26	1.40^b	1.46^b	2.13^a	0.19	0.073	0.028
Glutamine	13.84^b	13.30^b	18.86^a	1.57	10.95	9.87	12.77	1.29	0.046	0.300
Glycine	10.12	10.79	11.01	0.80	5.34	5.64	6.83	0.61	0.723	0.224
Proline	1.59	1.47	1.67	0.13	1.29	1.27	1.28	0.14	0.536	0.907
Serine	2.56^b	2.33^b	3.50^a	0.19	1.88	1.98	2.06	0.23	< 0.01	0.863
Tyrosine	2.36^a	2.03^ab	1.77^b	0.14	2.16	1.95	2.12	0.15	0.024	0.604
Others, μg/100 mg
Anserine	13.73^a	11.27^b	12.67^ab	0.66	18.58	17.24	16.10	1.04	0.072	0.269
Carnosine	411.88^a	351.99^ab	324.43^b	19.89	484.59	493.35	473.95	16.19	0.023	0.704
Taurine	14.81^b	15.04^b	18.99^a	1.08	15.35^b	16.23^b	19.69^a	1.00	0.027	0.032
TAA, μg/100 mg	25.83^b	26.77^b	30.33^a	1.12	16.68^b	17.90^b	21.72^a	0.92	0.028	0.013
EAA, μg/100 mg	14.04	14.15	14.64	0.59	12.03^b	11.32^b	13.95^a	0.61	0.829	<0.01
NEAA, μg/100 mg	49.98^b	48.99^b	59.24^a	2.42	35.52^b	35.07^b	42.47^a	1.47	0.023	0.038

^a,bWithin a row, values with different superscript letters differ (P < 0.05).

^aTAA = tasty AA, including alanine, aspartic acid, glutamic acid, and glycine; EAA = essential AA; NEAA = non-essential AA.

^bDietary treatment: NP = normal protein; LP = low protein; VLP = very low protein.