Table 3 Amino acid content of fermented Cynanchi wilfordii Radix (unit: mg/100 g)

Name	Fermentation period (day)
	0	4	8
	Asp	1.261)^a2)±0.73	0.37^a±0.20	1.53^a±0.71
Thr	0.19^b±0.03	0.35^b±0.12	2.51^a±0.38
Ser	ND3)	0.18^b±0.08	1.23^a±0.29
AspNH2	4.92^a±0.45	0.19^c±0.06	1.59^b±0.54
Glu	11.23^a±1.67	0.46^b±0.01	1.35^b±0.58
GluNH2	ND	0.22^b±0.03	1.36^a±0.41
Gly	1.42^a±0.25	0.2^b±0.09	0.79^ab±0.23
Ala	6.32±0.69	1.97^c±0.24	9.24^a±0.94
Val	2.65^a±0.04	0.24^c±0.14	1.51^b±0.59
Cys	1.15^a±0.06	0.03^a±0.05	0.8^a±1.02
Met	0.17^a±0.06	0.07^a±0.11	0.42^a±0.17
Ile	2.12^a±0.16	0.2^c±0.16	1.22^b±0.38
Leu	3.1^a±0.43	0.41^b±0.47	2.62^a±0.89
Tyr	2.26^a±0.16	0.14^c±0.15	1.18^b±0.39
Phe	3.07^a±0.27	0.35^b±0.23	1.96^a±0.56
g-ABA	12.76^a±1.40	2.86^b±0.03	6.13^b±1.11
EOHNH2	0.26^a±0.03	0.05^b±0.07	0.15^ab±0.01
NH3	2.16^a±0.20	0.24^c±0.02	0.81^b±0.18
Orn	5.98^a±0.48	1.19^b±1.10	5.71^a±0.90
Lys	2.95^a±1.28	0.34^a±0.28	1.31^a±1.22
His	2.26^a±0.61	0.32^b±0.07	0.92^ab±0.53
Arg	151.06^a±2.11	21.34^c±1.30	46^b±5.06
Total amino acid	217.27	31.72	90.36
Total essential	16.5	2.1	12.73
amino acid	16.5	2.1	12.73

Values are mean±SD (n=3).
Means with different superscript in the same column are significantly different at p<0.05 by Duncan’s multiple range tests.
ND, not detected.