Palaeoproteomic Profiling of Conservation Layers on a 14th Century Italian Wall Painting

Autor:	Meaghan Mackie, Jesper V. Olsen, Lynne Harrison, Patrick Rüther, David A. Peggie, Clara Granzotto, Enrico Cappellini, Lars Juhl Jensen, Diana Samodova, David Lyon, Fabiana Di Gianvincenzo, Helen Howard
Rok vydání:	2018
Předmět:	0301 basic medicine Painting Chemistry Starch Communication 010401 analytical chemistry General Chemistry General Medicine cultural heritage 01 natural sciences Catalysis Communications 0104 chemical sciences Prolonged exposure chemistry.chemical_compound 03 medical and health sciences proteomics 030104 developmental biology Posttranslational modification post-translational modifications Conservation science Food science Egg white Conservation Science mass spectrometry
Zdroj:	Angewandte Chemie (International Ed. in English) Mackie, M E, Rüther, P L, Samodova, D, Di Gianvincenzo, F, Granzotto, C, Lyon, D, Peggie, D A, Howard, H, Harrison, L, Jensen, L J, Olsen, J V & Cappellini, E 2018, ' Palaeoproteomic Profiling of Conservation Layers on a 14th Century Italian Wall Painting ', Angewandte Chemie (International ed. in English), vol. 57, no. 25, pp. 7369-7374 . https://doi.org/10.1002/anie.201713020 Angewandte Chemie International Edition
ISSN:	0044-8249
DOI:	10.1002/ange.201713020
Popis:	Ahead of display, a non‐original layer was observed on the surface of a fragment of a wall painting by Ambrogio Lorenzetti (active 1319, died 1348/9). FTIR analysis suggested proteinaceous content. Mass spectrometry was used to better characterise this layer and revealed two protein components: sheep and cow glue and chicken and duck egg white. Analysis of post‐translational modifications detected several photo‐oxidation products, which suggest that the egg experienced prolonged exposure to UV light and was likely applied long before the glue layer. Additionally, glycation products detected may indicate naturally occurring glycoprotein degradation or reaction with a carbohydrate material such as starch, identified by ATR‐FTIR in a cross‐section of a sample taken from the painting. Palaeoproteomics is shown to provide detailed characterisation of organic layers associated with mural paintings and therefore aids reconstruction of the conservation history of these objects.
Databáze:	OpenAIRE
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