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Table 1 Molar balance of amino acids in the combination samples

From: A new insight into isotopic fractionation associated with decarboxylation in organisms: implications for amino acid isotope approaches in biogeoscience

Samples

Scientific name

Relative abundance (mol %)

Total contents of 7 amino acids (wt %)

Phe

Val

Leu

Ile

Gly

Ala

Glu

Mean

SD

Mean

SD

Mean

SD

Mean

SD

Mean

SD

Mean

SD

Mean

SD

Mean

SD

Natural marine samples

 Sponge*

Halichondria okadai

6.4

1.4

13.1

1.5

13.2

1.3

11.6

1.7

30.1

3.5

12.5

1.4

13.1

1.7

28.4

3.5

 Sea slug**

Hypselodoris festiva

6.6

0.9

13.9

0.9

12.8

2.1

11.7

1.2

29.5

1.2

13.1

1.0

12.4

2.9

28.7

2.3

Natural terrestrial samples

 Aphid*

Aphidoidea sp.

7.4

0.9

10.2

1.2

18.3

1.9

13.8

1.5

12.7

1.3

11.0

1.2

26.6

2.7

31.8

3.0

 Ladybug beetle*

Menochilus sexmaculatus

9.2

0.9

9.1

0.9

21.3

2.1

11.8

1.2

11.1

1.2

9.0

1.0

28.6

2.9

34.2

2.8

Reared samples

 Fall armyworm***

Spodoptera frugiperda

8.1

0.9

13.6

1.5

16.4

1.7

7.4

0.8

13.0

1.7

12.3

3.9

29.3

3.1

33.1

2.1

 Green lacewing #1***

Chrysoperla rufilabris

6.4

0.8

11.6

1.2

17.5

1.8

8.6

0.9

12.2

1.2

15.2

1.6

28.5

2.9

34.3

3.6

 Green lacewing #2***

Chrysoperla rufilabris

9.6

1.5

6.4

1.2

17.2

2.1

5.9

0.8

15.9

2.3

14.7

2.0

30.3

4.1

34.5

4.2

  1. * SD represents 1σ for comparing 3 injections for 1 aggregation (sponge), 1 colony (aphid), and 5 individuals (ladybug beetle)
  2. ** SD represents 1σ for comparing 3 injections for 1 individual (sea slug)
  3. *** SD represents 1σ for comparing 1 injection for each of 3 trophic groups (including 4-7 individuals for each group)