Table 5. The free amino acid content according to fermentation period of Kujippong vinegar by optimum conditions

(Unit : mg/mL)

Treatment¹⁾StrainPeriod (days) pH 4, 20℃

A26 A37 B7

0 6 12 18 24 30 0 6 12 18 24 30 0 6 12 18 24 30

Amino acid

Phosphoserine 0.011 0.012 0.018 0.013 0.015 0.015 0.014 0.014 0.015 0.014 0.012 0.012 0.024 0.021 0.020 0.027 0.018 0.027

Taurine 0.001 0.001 0.002 0.001 0.002 0.002 0.001 0.001 0.001 0.001 0.002 0.002 0.002 0.003 0.002 0.002 0.001 0.002

Aspartic acid 0.003 0.002 0.003 0.003 0.005 0.005 0.003 0.001 0.001 ND ND ND ND ND ND ND ND ND

Threonine 0.002 0.001 0.002 0.002 0.002 0.002 0.002 0.001 0.001 ND ND ND 0.007 0.006 ND ND ND ND

Serine 0.001 0.001 0.001 0.001 0.002 0.001 0.001 0.001 ND ND ND ND 0.004 0.004 ND ND ND ND

Asparagine 0.002 0.001 0.001 0.001 0.002 0.001 0.002 0.002 ND ND ND ND 0.002 0.002 ND ND ND ND

Glutamic acid 0.010 0.007 0.010 0.011 0.016 0.015 0.01 0.009 0.001 ND ND ND 0.021 0.022 0.019 0.009 0.004 0.005

Proline 0.019 0.014 0.017 0.016 0.024 0.021 0.017 0.014 0.002 0.001 0.001 0.001 0.127 0.128 0.023 ND ND ND

Glycine 0.002 0.002 0.002 0.002 0.003 0.002 0.002 0.002 ND 0.001 0.001 ND 0.005 0.005 ND ND ND ND

Alanine 0.010 0.007 0.009 0.008 0.012 0.010 0.010 0.008 ND 0.004 0.003 ND 0.021 0.022 0.001 ND ND ND

Valine 0.002 0.002 0.002 0.002 0.003 0.002 0.002 0.002 0.002 ND ND 0.001 0.006 0.007 0.002 0.001 0.001 0.001

Cystine 0.006 0.004 0.004 0.003 0.004 0.003 0.007 0.005 0.005 ND ND 0.004 0.01 0.01 0.006 0.008 0.005 0.007

Methionine ND²⁾ ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND

Isoleucine 0.005 0.003 0.004 0.004 0.006 0.005 0.004 0.003 0.002 0.001 0.001 0.001 0.010 0.010 0.005 0.004 0.002 0.003

Leucine 0.005 0.003 0.004 0.004 0.005 0.005 0.003 0.003 0.001 ND ND ND 0.011 0.011 0.004 0.002 0.001 0.001

Tyrosine 0.003 0.002 0.002 0.002 0.003 0.003 0.002 0.002 0.002 0.002 0.002 0.002 0.005 0.006 0.003 0.005 0.003 0.004

Phenylalanine 0.005 0.003 0.004 0.006 0.005 0.005 0.003 0.004 0.003 0.001 0.001 0.002 0.009 0.01 0.006 0.005 0.004 0.005

β-alanine ND ND ND ND ND ND 0.001 0.001 ND ND ND ND ND ND ND ND ND ND

β-Aminoisobutyric acid 0.049 0.033 0.041 0.039 0.051 0.045 0.052 0.041 0.044 0.037 0.035 0.041 0.088 0.094 0.055 0.082 0.047 0.073

γ-Aminobutyric acid 0.014 0.009 0.013 0.012 0.017 0.015 0.017 0.014 ND ND ND 0.002 0.033 0.033 0.003 ND ND ND

Histidine 0.002 0.002 0.002 0.002 0.002 0.002 0.002 0.002 0.002 0.002 0.002 0.002 0.004 0.004 0.002 0.001 0.001 0.001

Ornithine 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.002 0.002 0.001 0.001 0.001 0.001

Lysine 0.021 0.016 0.018 0.017 0.023 0.021 0.020 0.017 0.014 0.01 0.01 0.007 0.033 0.032 0.008 0.005 0.003 0.002

Ammonia 0.001 0.001 0.001 0.001 0.002 0.002 ND ND ND ND ND ND 0.001 0.001 ND ND ND ND

Arginine 0.014 0.007 0.010 0.009 0.013 0.012 0.009 0.008 0.005 ND ND ND 0.019 0.019 ND ND ND ND

Total 0.189 0.134 0.171 0.16 0.218 0.195 0.185 0.156 0.102 0.075 0.071 0.078 0.444 0.452 0.16 0.152 0.091 0.132

¹⁾pH 4, initial acidity; 20℃, fermentation temperature.
²⁾ND, not detected.

Treatment¹⁾StrainPeriod (days)	pH 4, 20℃
	A26						A37						B7
	0	6	12	18	24	30	0	6	12	18	24	30	0	6	12	18	24	30
Amino acid	0	6	12	18	24	30	0	6	12	18	24	30	0	6	12	18	24	30
Phosphoserine	0.011	0.012	0.018	0.013	0.015	0.015	0.014	0.014	0.015	0.014	0.012	0.012	0.024	0.021	0.020	0.027	0.018	0.027
Taurine	0.001	0.001	0.002	0.001	0.002	0.002	0.001	0.001	0.001	0.001	0.002	0.002	0.002	0.003	0.002	0.002	0.001	0.002
Aspartic acid	0.003	0.002	0.003	0.003	0.005	0.005	0.003	0.001	0.001	ND	ND	ND	ND	ND	ND	ND	ND	ND
Threonine	0.002	0.001	0.002	0.002	0.002	0.002	0.002	0.001	0.001	ND	ND	ND	0.007	0.006	ND	ND	ND	ND
Serine	0.001	0.001	0.001	0.001	0.002	0.001	0.001	0.001	ND	ND	ND	ND	0.004	0.004	ND	ND	ND	ND
Asparagine	0.002	0.001	0.001	0.001	0.002	0.001	0.002	0.002	ND	ND	ND	ND	0.002	0.002	ND	ND	ND	ND
Glutamic acid	0.010	0.007	0.010	0.011	0.016	0.015	0.01	0.009	0.001	ND	ND	ND	0.021	0.022	0.019	0.009	0.004	0.005
Proline	0.019	0.014	0.017	0.016	0.024	0.021	0.017	0.014	0.002	0.001	0.001	0.001	0.127	0.128	0.023	ND	ND	ND
Glycine	0.002	0.002	0.002	0.002	0.003	0.002	0.002	0.002	ND	0.001	0.001	ND	0.005	0.005	ND	ND	ND	ND
Alanine	0.010	0.007	0.009	0.008	0.012	0.010	0.010	0.008	ND	0.004	0.003	ND	0.021	0.022	0.001	ND	ND	ND
Valine	0.002	0.002	0.002	0.002	0.003	0.002	0.002	0.002	0.002	ND	ND	0.001	0.006	0.007	0.002	0.001	0.001	0.001
Cystine	0.006	0.004	0.004	0.003	0.004	0.003	0.007	0.005	0.005	ND	ND	0.004	0.01	0.01	0.006	0.008	0.005	0.007
Methionine	ND²⁾	ND	ND	ND	ND	ND	ND	ND	ND	ND	ND	ND	ND	ND	ND	ND	ND	ND
Isoleucine	0.005	0.003	0.004	0.004	0.006	0.005	0.004	0.003	0.002	0.001	0.001	0.001	0.010	0.010	0.005	0.004	0.002	0.003
Leucine	0.005	0.003	0.004	0.004	0.005	0.005	0.003	0.003	0.001	ND	ND	ND	0.011	0.011	0.004	0.002	0.001	0.001
Tyrosine	0.003	0.002	0.002	0.002	0.003	0.003	0.002	0.002	0.002	0.002	0.002	0.002	0.005	0.006	0.003	0.005	0.003	0.004
Phenylalanine	0.005	0.003	0.004	0.006	0.005	0.005	0.003	0.004	0.003	0.001	0.001	0.002	0.009	0.01	0.006	0.005	0.004	0.005
β-alanine	ND	ND	ND	ND	ND	ND	0.001	0.001	ND	ND	ND	ND	ND	ND	ND	ND	ND	ND
β-Aminoisobutyric acid	0.049	0.033	0.041	0.039	0.051	0.045	0.052	0.041	0.044	0.037	0.035	0.041	0.088	0.094	0.055	0.082	0.047	0.073
γ-Aminobutyric acid	0.014	0.009	0.013	0.012	0.017	0.015	0.017	0.014	ND	ND	ND	0.002	0.033	0.033	0.003	ND	ND	ND
Histidine	0.002	0.002	0.002	0.002	0.002	0.002	0.002	0.002	0.002	0.002	0.002	0.002	0.004	0.004	0.002	0.001	0.001	0.001
Ornithine	0.001	0.001	0.001	0.001	0.001	0.001	0.001	0.001	0.001	0.001	0.001	0.001	0.002	0.002	0.001	0.001	0.001	0.001
Lysine	0.021	0.016	0.018	0.017	0.023	0.021	0.020	0.017	0.014	0.01	0.01	0.007	0.033	0.032	0.008	0.005	0.003	0.002
Ammonia	0.001	0.001	0.001	0.001	0.002	0.002	ND	ND	ND	ND	ND	ND	0.001	0.001	ND	ND	ND	ND
Arginine	0.014	0.007	0.010	0.009	0.013	0.012	0.009	0.008	0.005	ND	ND	ND	0.019	0.019	ND	ND	ND	ND
Total	0.189	0.134	0.171	0.16	0.218	0.195	0.185	0.156	0.102	0.075	0.071	0.078	0.444	0.452	0.16	0.152	0.091	0.132