Table 3. Free amino acids of porcine M. subscapularis muscle from LYD, Berkshire, and Ibérico pigs

Free AA (mg/100 g)	LYD	Berkshire sow	Berkshire barrow	Ibérico	SEM¹⁾
Taurine	608.65^b	640.60^b	597.73^b	758.73^a	32.29
Aspartic acid	193.99	167.27	178.35	164.58	16.93
Threonine	66.26^b	68.21^b	61.06^b	155.58^a	3.14
Serine	75.72^b	100.25^b	98.37^b	239.59^a	6.09
Asparagine	107.84^b	105.80^b	95.34^b	142.85^a	8.59
Glutamic acid	663.40^a	465.70^ab	384.93^ab	251.83^b	87.49
Glycine	297.30^b	286.15^b	295.57^b	414.04^a	15.14
Alanine	513.90^b	447.36^b	483.17^b	950.96^a	28.03
Valine	52.87^b	54.74^b	55.11^b	145.18^a	7.91
Methionine	19.98^b	18.46^b	21.78^b	57.08^a	3.07
lsoleucine	26.92^b	30.52^b	29.79^b	100.59^a	3.47
Leucine	67.00^c	86.96^b	82.14^b	228.34^a	4.55
Tyrosin	34.61^b	38.04^b	41.50^b	51.22^a	2.71
Phenyalanine	37.96^b	37.57^b	35.47^b	104.00^a	2.13
Tryptophan	398.81^ab	466.76^a	394.62^ab	337.08^b	23.81
Carnorsine	9.33	215.39	101.9	155.91	84.22
Lysine	46.96	136.79	73.66	106.62	28.17
Ammonia	117.19	161.46	93.82	141.8	34.1
Arginine	72.54	70.6	16.39	65.39	34.56
Histidine	15.36	3.53	1.67	15.4	6.63
∑Tasty AA	2,507.76^b	2,349.93^b	2,207.08^b	3,029.21^a	136.25
∑Bitter AA	277.27^b	298.85^b	240.69^b	700.59^a	34.43
Tasty/bitter AA	9.88	8.16	9.26	4.33	1.35

Values with different superscripts letters within the same row differ significantly (p<0.05).
n=12.
AA, amino acids; LYD, Landrace×Yorkshire×Duroc.