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. 2019 Apr 28;24(9):1665. doi: 10.3390/molecules24091665

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© 2019 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

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Representative chromatograms for blank (A), standards (B) and the typical chromatograms for the amino acids derivatives in peel and pulp of Nitraria tangutorum Bobr. (C) peak labels: 1. cysteine HCl (Cys), 2. Histidine (His), 3. ornithine (Orn), 4. arginine (Arg), 5. lysine (Lys), 6. Serine (Ser), 7. aspartic acid (Asp), 8. glutamic acid (Glu), 9. threonine (Thr), 10. Glycine (Gly),11. tryptophan (Trp), 12. alanine (Ala), 13. tyrosine (Tyr), 14. proline (Pro), 15. methionine (Met), 16. valine (Val), 17. phenylalanine (Phe), 18 isoleucine (Ile and 19. leucine (Leu).