Table 4. Free amino acid composition (% of total free amino acids) of longissimus dorsi muscles from Berkshire and LYD pigs

	Berkshire (n=15)	LYD (n=15)
Phosphoserine	0.28±0.01^a	0.24±0.01^b
Taurine	9.74±0.29	10.29±0.42
Aspartic Acid	4.46±0.11^a	1.59±0.17^b
Threonine	3.36±0.06^a	3.05±0.09^b
Serine	3.84±0.12^a	3.34±0.15^b
Asparagine	4.68±0.18^a	3.81±0.57^b
Glutamic Acid	9.74±0.50^b	13.91±0.71^a
α-Aminoadipic	1.61±0.16^a	0.77±0.26^b
Glycine	15.28±0.23^b	17.85±0.32^a
Alanine	12.86±0.28^b	16.64±0.40^a
Citrulline	0.97±0.08	1.11±0.10
Valine	3.01±0.06^a	2.09±0.08^b
Cystine	0.09±0.01	0.1±0.01
Methionine	1.75±0.05^a	1.35±0.07^b
Isoleucine	1.76±0.04^a	1.11±0.06^b
Leucine	4.42±0.11^a	2.90±0.15^b
Tyrosine	2.66±0.06^a	1.78±0.09^b
Phenylalanine	2.48±0.07^a	1.92±0.10^b
β-Alanine	0.17±0.01	0.15±0.01
r-Aminobutyric	0.18±0.01	0.17±0.01
Histidine	1.19±0.03^a	0.96±0.04^b
3-Methylhistidine	0.10±0.004	0.09±0.01
Tryptophan	6.37±0.25^a	4.41±0.35^b
Carnosine	0.51±0.05^a	0.29±0.08^b
Ornithine	0.17±0.02^b	0.55±0.030^a
Lysine	1.56±0.03	1.67±0.04
Ammonia	6.61±0.35^b	7.95±0.49^a
Arginine	0.94±0.03	0.99±0.04