Table 4. Free amino acid contents of fermented yogurt

Free amino acid (mg/L)	Control1)	JSRL18-60	LGG
Phosphoserine	7.59±0.562)	9.07±0.37	8.33±0.37
Taurine	6.89±0.10	8.76±0.25	18.20±0.31
PEA	ND3)	ND	ND
Aspartic acid	1.51±0.01	1.72±0.01	0.29±0.05
Threonine	0.58±0.06	1.64±0.01	0.29±0.05
Serine	0.50±0.06	0.16±0.01	0.34±0.03
Glutamic acid	22.03±0.13	9.66±0.09	21.45±0.40
Sarcosine	1.31±0.09	0.30±0.11	1.01±0.05
α-Amino adipic acid	1.02±0.14	0.59±0.11	0.75±0.03
Glycine	7.18±0.07	9.21±0.01	10.69±0.14
Alanine	2.09±0.01	2.00±0.04	4.10±0.10
α-Amino butyric acid	0.36±0.02	0.32±0.01	ND
Valine	0.74±0.03	0.84±0.03	0.79±0.02
Cysteine	3.05±0.15	4.56±0.07	3.67±0.12
Methionine	ND	ND	ND
Cystathionine	0.28±0.01	2.46±0.05	1.49±0.02
Isoleucine	0.13±0.01	0.08±0.01	0.49±0.03
Leucine	0.40±0.01	1.25±0.01	2.96±0.15
Tyrosine	0.19±0.01	ND	ND
Phenylalanine	1.01±0.01	0.96±0.02	1.12±0.07
β-Alanine	6.08±0.29	7.92±0.24	6.79±0.24
β-Aminoisobutyric acid	1.72±0.40	2.79±0.13	2.66±0.15
γ-Aminobutyric acid	0.30±0.10	0.97±0.05	0.98±0.05
Ethanolamine	1.91±0.02	3.10±0.14	3.50±0.07
Ammonia	14.81±0.03	17.39±0.34	16.06±0.33
5-Hydroxylysine	ND	1.10±0.05	ND
Ornithine	1.42±0.06	2.45±0.02	1.63±0.03
Lysine	0.25±0.01	1.10±0.01	0.99±0.03
Arginine	1.33±0.01	0.42±0.02	2.84±0.10

Non-fermented skimmed milk.
Value are means±SD of triplicate determinations.
Not detected.