Table 3. The composition of FAAs in FSO

FAAs (mg/100 g)	FSO
	Pre-fermentation	Post-fermentation
Histidine	0.00 ± 0.00	17.96 ± 0.07
3-Methylhistidine	4.42 ± 0.86	0.00 ± 0.00
a-Amino adipic acid	2.53 ± 0.56	0.00 ± 0.00
Anserine	0.00 ± 0.00	37.23 ± 0.07
Carnosine	2.36 ± 0.46	0.00 ± 0.00
Cystathionine	1.66 ± 0.12	0.00 ± 0.00
Ethanol amine	3.25 ± 0.86	3.39 ± 0.08
Phosphor ethanol amine	0.00 ± 0.00	0.00 ± 0.00
Sarcosine	3.21 ± 0.37	0.00 ± 0.00
Urea	0.00 ± 0.00	0.00 ± 0.00
Hydroxyproline	0.20 ± 0.09	0.25 ± 0.01
Hydroxylysine	1.55 ± 0.15	0.74 ± 0.06
Valine1)	3.41 ± 0.56	16.47 ± 0.35
Isoleucine1)	50.96 ± 1.66	59.87 ± 1.13
1-Methylhistidine	0.00 ± 0.00	0.00 ± 0.00
Threonine	40.54 ± 1.16	54.15 ± 0.78
a-Amino-n-butyric acid	0.00 ± 0.00	12.47 ± 0.00
Leucine1)	86.23 ± 1.38	122.65 ± 0.93
Phenylalanine	180.09 ± 5.66	217.93 ± 0.05
β-Amino isobutyric acid	42.18 ± 1.28	5.77 ± 0.86
Methionine	29.73 ± 1.16	40.97 ± 0.78
Lysine	60.98 ± 2.56	71.67 ± 1.77
Aspartic acid	59.37 ± 5.16	68.75 ± 3.61
Serine	46.60 ± 2.36	62.81 ± 1.63
Cystine	98.63 ± 5.16	79.97 ± 3.61
Tyrosine	41.21 ± 1.26	49.25 ± 0.85
Phosphoserine	18.13 ± 0.36	16.49 ± 0.21
Ornithine	28.76 ± 1.27	0.96 ± 0.11
β-Alanine	22.81 ± 0.96	8.35 ± 0.14
Alanine	91.80 ± 2.56	39.57 ± 1.77
Proline	34.06 ± 0.76	36.17 ± 0.49
Citruline	19.22 ± 0.60	221.48 ± 0.38
Glycine	54.61 ± 0.27	58.4 ± 0.15
Glutamic acid	1,536.40 ± 10.1	12.95 ± 0.53
γ-Amino-n-butyric acid	59.97 ± 2.16	1,053.72 ± 1.48
Taurine	93.17 ± 1.60	87.56 ± 1.09
Arginine	6,320.33 ± 11.1	6,183.40 ± 7.78

Branched-chain amino acids.
FAA, free amino acid; FSO, fermented sarco oyster extract.