Journal
SCIENTIFIC REPORTS
Volume 7, Issue -, Pages -Publisher
NATURE PUBLISHING GROUP
DOI: 10.1038/srep46289
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Funding
- Agricultural Science and Technology Innovation Program [ASTIP-IAS12]
- Special fund for Agro-scientific Research in the Public Interest [201403071]
- Project of risk assessment on raw milk [GJFP2016009]
- China Postdoctoral Science Foundation Funded Project (Beijing, China) [2014M550907]
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Milk contains free amino acids (AAs) that play essential roles in maintaining the growth and health of infants, and D-AA isomers are increasingly being recognized as important signalling molecules. However, there are no studies of the different characteristics of chiral AA (C-AA) from different milk origins. Here, UPLC coupled to ion-mobility high-resolution MS (IM-HRMS) was employed to characterize 18 pairs of C-AAs in human, cow, yak, buffalo, goat, and camel milk. The results proved that milk origins can be differentiated based on the D-to L-AA ratio-based projection scores by principal component analysis. The present study gives a deeper understanding of the D-to L-AA ratio underlying the biological functions of different animal milks, and provide a new strategy for the study of AA metabolic pathways.
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