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Table 2 Amino acid content in feather hydrolysate

From: Biotransformation of keratin waste to amino acids and active peptides based on cell-free catalysis

Amino acid

Concentration (mg/L)

Supernatant

Hydrolysate

asp

27.93 ± 1.57

130.80 ± 3.94

glu

122.86 ± 0.55

380.78 ± 15.42

ser

7.72 ± 0.89

40.28 ± 1.56

his

6.38 ± 1.21

76.58 ± 3.67

gly

8.91 ± 0.12

94.30 ± 6.19

thr

25.70 ± 2.44

136.36 ± 5.28

arg

23.44 ± 0.18

19.80 ± 0.31

ala

138.23 ± 4.36

247.44 ± 5.59

tyr

55.57 ± 1.38

301.76 ± 14.27

cys-s

23.34 ± 0.28

28.58 ± 0.59

val

531.75 ± 10.55

337.62 ± 16.20

met

204.99 ± 2.77

247.16 ± 4.63

phe

401.76 ± 8.54

577.54 ± 17.48

ile

45.25 ± 0.45

105.62 ± 7.19

leu

50.30 ± 2.11

220.06 ± 8.32

lys

154.67 ± 5.17

360.48 ± 14.29

Total

1828.79

3305.16

  1. Supernatant means the fermentation supernatant; hydrolysate means the products from feather hydrolysis