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The identification of archaeological eggshell using peptide markers

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JournalSTAR: Science Technology of Archaeological Research
DateAccepted/In press - 30 Dec 2017
DatePublished (current) - 23 Feb 2018
Issue number1
Volume4
Number of pages10
Pages (from-to)13-23
Original languageEnglish

Abstract

Avian eggshell survives well in alkaline and neutral soils, but its potential as an archaeological resource remains largely unexplored, largely due to difficulties in its identification. Here we exploit the release of novel bird genomes and, for the first time on eggshell, use MALDI-ToF mass spectrometry in combination with peptide sequencing by LC-MS/MS. The eggshell proteome is revealed as unexpectedly complex, with 5755 proteins identified for a reference collection comprising 23 bird species. We determined 782 m/z markers useful for eggshell identification, 583 of which could be assigned to known eggshell peptide sequences. These were used to identify eggshell fragments recovered from a medieval site at Freeschool Lane, Leicester. We discuss the specificity of the peptide markers and highlight the importance of assessing the level of taxonomic identification achievable for archaeological interpretation.

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© 2018 The Author(s). Published by Informa UK Limited, trading as Taylor & Francis Group

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