Table 2 Change of free amino acids content of Doenjang with different salt contents

Kind of amino acids		Doenjang
		A	B	C	D	E
		Non polar	Alanine	2.630	2.625	2.765	6.786	3.444
Glycine	1.176		1.197	1.68	1.878	1.311
Isoleucine	2.392		2.526	0.851	3.087	2.526
Leucine	3.807		4.061	1.387	4.789	4.104
Methionine	0.796		0.827	0.659	0.821	0.851
Proline	1.474		1.564	0.723	1.238	1.532
Valine	2.374		2.546	1.600	3.194	2.543
Polar	Serine	2.248	2.383	0.034	0.017	2.419
	Threonine	1.690	1.871	0.062	0.094	1.847
	Cystein	0.209	0.206	0.168	0.265	0.238
Basic	Lysine	2.845	3.062	3.402	3.668	3.007
	Arginine	0.600	0.654	ND	ND	0.450
	Histidine	0.393	0.466	0.132	0.014	0.424
Acid	Aspartic acid	2.916	3.247	2.192	0.467	2.381
	Glutamic acid	6.106	6.252	5.981	6.031	6.745
Aromatic	Phenylalanine	2.532	2.713	2.083	2.622	2.669
	Tyrosine	2.675	2.523	0.705	1.382	1.286
	Citrulline	0.344	0.374	ND	ND	0.363
	Cystathionine	ND	ND	0.158	ND	ND
	Ethanol amine	0.085	0.081	ND	ND	0.077
	α-Amino-n-butyric acid	ND	ND	1.433	1.867	ND
	β-Alanine	0.089	0.099	0.066	0.074	0.119
	β-Amino isobutyric acid	ND	0.314	0.099	0.226	0.342
	γ-Amino-n-butyric acid	0.108	0.094	0.078	1.049	0.109
Total free amino acid contents (mg/g)		37.489	39.685	26.258	39.569	38.787