Table 3.

Top 12 amino acid metabolites of LD muscles in the TF pigs.

No.	Ionization model	m/z	Formula	Metabolites	Ion mode	Fold change	P-value
1	[M-H]−	118.03	C4H6O4	Succinic-acid	Negative	0.98847	0.92353
2	[M-H]−	131.06	C5H9NO3	N-propionylglycine	Negative	0.90677	0.80671
3	[M-H]−	159.09	C7H13NO3	N-isovaleroylglycine	Negative	1.11198	0.83821
4	[M-H]−	125.15	C2H7NO3S	2-Aminoethanesulfonic-acid	Negative	1.07024	0.54600
5	[M+H]+	612.15	C20H32N6O12S2	Glutathione-oxidized	Positive	0.91251	0.51476
6	[M+H]+	384.12	C14H20N6O5S	S-(5-Adenosyl)-L-homocysteine	Positive	0.90740	0.38512
7	[M+H]+	333.13	C16H19N3O5	TRP-GLU	Positive	1.10202	0.64443
8	[M+H]+	309.11	C11H19NO9	N-acetylneuraminic-acid	Positive	1.28692	0.38958
9	[M+H]+	306.97	C9H10INO3	3-Iodo-L-tyrosine	Positive	Inf	0.37390
10	[M+H]+	290.27	C10H18N4O6	Argininosuccinic-acid	Positive	1.13755	0.69561
11	[M+H]+	280.11	C13H16N2O5	Asp-Phe	Positive	0.99002	0.96465
12	[M+H]+	268.06	C8H16N2O4S2	L-homocystine	Positive	Inf	0.21155

RT, retention time.