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Table 3 Amino acid profiles in the Pompeian’s painting samples

From: An enhanced procedure for the analysis of organic binders in Pompeian’s wall paintings from Insula Occidentalis

Amino acids Sample S1 Sample S2 Sample S3 Sample S4 Sample S5
mg/kg % mg/kg % mg/kg % mg/kg % mg/kg %
Arginine 34 0.4 36 1.7 58 2.6 21 1.2 132 2.0
Citrulline 90 1.2 79 3.8 56 2.5 34 1.9 131 2.0
Lysine 57 0.8 55 2.6 14 0.6 18 1.0 163 2.5
Ornithine 402 5.3 449 21.5 632 27.8 359 20.4 209 3.2
Asparagine 49 0.6 ND 0.0 ND 0.0 ND 0.0 ND 0.0
Glutamine 139 1.8 93 4.5 ND 0.0 ND 0.0 37 0.6
Glutamate 501 6.6 189 9.1 142 6.3 221 12.5 491 7.4
Aspartate 240 3.2 81 3.9 53 2.3 37 2.1 171 2.6
Tyrosine 107 1.4 48 2.3 55 2.4 28 1.6 75 1.1
Phenylalanine 92 1.2 144 6.9 60 2.6 136 7.7 136 2.1
Isoleucine 114 1.5 122 5.8 100 4.4 78 4.4 114 1.7
Leucine 155 2.0 42 2.0 150 6.6 46 2.6 155 2.4
Proline 670 8.8 164 7.9 456 20.1 337 19.1 505 7.7
Threonine 41 0.5 80 3.8 24 1.1 18 1.0 158 2.4
5-oxo-Proline 900 11.9 169 8.1 189 8.3 140 7.9 215 3.3
Alanine 476 6.3 30 1.4 31 1.4 28 1.6 531 8.1
Serine 213 2.8 61 2.9 65 2.9 54 3.1 836 12.7
Glycine 3311 43.6 244 11.7 187 8.2 209 11.8 2536 38.5
Total 7592 100 2087 100 2272 100 1764 100 6595 100
  1. ND not detectable