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Table 1 Relative amino acid percentages and contents in the samples

From: The chemical-physical knowledge before the restoration: the case of “The Plague in Lucca”, a masterpiece of Lorenzo Viani (1882–1936)

Sample

Ala

Gly

Val

Leu

Ile

Ser

Pro

Phe

Asp

Glu

Hyp

Amino acid content (μg)

1

9.2

20.8

4.7

6.1

3.5

7.6

9.1

4.1

7.0

15.3

12.7

0.80

2

9.1

16.8

7.3

9.4

5.6

2.8

11.7

6.6

7.0

19.2

4.4

0.8

3

8.4

22.8

5.3

8.1

3.5

2.6

20.8

3.9

7.3

12.7

4.5

0.5

4

9.9

24.3

3.0

4.4

1.9

3.2

14.6

3.1

8.5

18.1

12.7

11.2