Table 2 Free amino acid contents of unfermented, and fermented silkworm

Phosphoserine

0.17

0.08

Taurine

–

0.12

Urea

–

–

L-Aspartic acid

0.20

0.23

L-Threonine

0.49

0.76

L-Serine

1.08

0.49

L-Glutamic acid

3.17

3.05

L-Valine

0.43

1.31

L-Methionine

–

0.01

L-Isoleucine

0.24

1.08

L-Leucine

0.37

1.42

L-Tyrosine

0.71

0.92

L-Phenylalanine

1.17

1.39

γ-amino-n-butyric acid

0.02

–

Phosphoethanolamine

0.50

–

L-lysine

0.38

0.04

1-Methyl-L-Histidine

–

0.29

L-Histidine

2.17

0.22

L-Arginine

2.66

0.07

L-Cystine

–

0.03

Asparagine

3.06

–

L-α-Aminoadipic acid

0.22

0.05

L-Proline

0.28

0.38

L-Glycine

1.31

0.42

L-Alanine

1.45

1.75

L-Citrulline

–

0.13

L-α-Aminobutyric acid

0.02

–

L-Orinithine

0.18

2.26

Total free amino acid

20.28

16.50