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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)