¹H HR-MAS NMR Spectroscopy and the Metabolite Determination of Typical Foods in Mediterranean Diet

Figure 4

Comparison between the one-dimensional proton spectra of the lemon juice from PGI Interdonato lemon of Messina (red line) and Interdonato Turkish lemon (black line) in the region of amino acids. 1: saturated fatty acids, 2: isoleucine, 3: leucine, 4: valine, 5: ethanol, 6: unsaturated fatty acids, 7: threonine, 8: lactic acid, 9: alanine, 10: arginine, 11: DSS, 12: lysine, 13: GABA, 14: proline, 15: glutamic acid, 16: glutamine, 17: isocitric acid, 18: aspartic compound, 19: citric acid, 20: malic acid, 21: asparagine, and 22: stachydrine.