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Earth, Planets and Space
Fig. 3 | Earth, Planets and Space

Fig. 3

From: Amino acids on witness coupons collected from the ISAS/JAXA curation facility for the assessment and quality control of the Hayabusa2 sampling procedure

Fig. 3

a GC/NPD chromatograms of the witness coupons and chemical structures of the detected amino acids. b GC/NPD chromatograms of the authentic amino acid standards. The numbered peaks refer to the following: 1. α-aminoisobutyric acid; 2. α-alanine; 3. glycine; 4. isovaline; 5. α-aminobutyric acid; 6. sarcosine; 7. β-alanine; 8. β-aminobutyric acid; 9. valine; 10. β-aminoisobutyric acid; 11. N-ethylglycine; 12. norvaline; 13. leucine; 14. allo-isoleucine; 15. isoleucine; 16. norleucine; 17. γ-aminobutyric acid; 18. proline; 19. aspartic acid; 20. threonine; 21. serine; 22. methionine; 23. glutamic acid; 24. α-aminoadipic acid

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