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Table 5 Amino acid composition of the protein fraction from durian seed gum

From: Chemical composition and molecular structure of polysaccharide-protein biopolymer from Durio zibethinusseed: extraction and purification process

Amino acid

Control sample

Purified gum A

Purified gum B

Purified gum C

Purified gum D

Asp

7.19 ± 0.13a

6.19 ± 0.44b

6.95 ± 0.26ab

6.10 ± 0.58b

6.50 ± 0.75ab

Glu

7.09 ± 0.22a

5.57 ± 0.25b

6.54 ± 0.34a

6.18 ± 0.35ab

6.42 ± 0.34a

Ser

4.67 ± 0.50a

5.06 ± 0.32a

4.53 ± 0.57a

5.18 ± 0.12a

4.39 ± 0.29a

Gly

7.42 ± 0.29a

6.22 ± 0.58b

6.43 ± 0.20b

7.36 ± 0.20a

6.07 ± 0.15b

His

1.13 ± 0.15a

1.14 ± 0.19a

0.88 ± 0.04a

1.00 ± 0.09a

0.81 ± 0.10a

Arg

3.51 ± 0.25a

3.40 ± 0.21a

2.87 ± 0.12ab

3.16 ± 0.16a

2.38 ± 0.22b

Thr

6.50 ± 0.19a

5.41 ± 0.42b

6.47 ± 0.45a

4.99 ± 0.43bc

3.44 ± 0.34c

Ala

6.14 ± 0.36a

5.68 ± 0.24a

5.97 ± 0.23a

6.08 ± 0.25a

5.24 ± 0.43a

Pro

4.35 ± 0.16a

4.17 ± 0.75a

3.87 ± 0.41a

4.81 ± 0.42a

4.06 ± 0.58a

Tyr

2.19 ± 0.21a

1.91 ± 0.09a

1.63 ± 0.22a

1.95 ± 0.19a

1.84 ± 0.29a

Val

5.15 ± 0.43a

4.59 ± 0.43a

4.50 ± 0.24a

5.50 ± 0.46a

4.90 ± 0.16a

Met

0.59 ± 0.07a

0.50 ± 0.03a

0.52 ± 0.06a

0.98 ± 0.10b

0.69 ± 0.09a

Ile

3.89 ± 0.18a

3.63 ± 0.22a

3.30 ± 0.29a

4.07 ± 0.23a

3.73 ± 0.22a

Leu

37.1 ± 1.87a

37.3 ± 1.67a

30.9 ± 1.87b

34.6 ± 1.87ab

35.6 ± 1.15a

Phe

3.11 ± 0.12a

9.04 ± 0.87b

6.93 ± 0.22c

8.13 ± 0.38b

7.62 ± 0.26bc

Lys

8.36 ± 0.23a

7.88 ± 0.46a

7.65 ± 0.65ab

7.32 ± 0.28a

6.04 ± 0.25b

Hpr

-

-

-

-

-

  1. Aspartic acid (Asp), glutamic acid (Glu), serine (Ser), glycine (Gly), histidine (His), arginine (Arg), threonine (Thr), alanine (Ala), proline (Pro), tyrosine (Tyr), valine (Val), methionine (Met), isoleucine (Ile), leucine (Leu), phenylalanine (Phe), and lysine (Lys); A: isopropanol and ethanol; B: isopropanol and acetone; C: saturated barium hydroxide; D: Fehling solution; a-d significant at p < 0.05: Mean ± standard deviation.