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Screening archaeological bone for palaeogenetic and palaeoproteomic studies.

Published version
Peer-reviewed

Type

Article

Change log

Authors

Kontopoulos, Ioannis  ORCID logo  https://orcid.org/0000-0001-5591-8917
Penkman, Kirsty 
Mullin, Victoria E 
Winkelbach, Laura 
Unterländer, Martina 

Abstract

The recovery and analysis of ancient DNA and protein from archaeological bone is time-consuming and expensive to carry out, while it involves the partial or complete destruction of valuable or rare specimens. The fields of palaeogenetic and palaeoproteomic research would benefit greatly from techniques that can assess the molecular quality prior to sampling. To be relevant, such screening methods should be effective, minimally-destructive, and rapid. This study reports results based on spectroscopic (Fourier-transform infrared spectroscopy in attenuated total reflectance [FTIR-ATR]; n = 266), palaeoproteomic (collagen content; n = 226), and palaeogenetic (endogenous DNA content; n = 88) techniques. We establish thresholds for three different FTIR indices, a) the infrared splitting factor [IRSF] that assesses relative changes in bioapatite crystals' size and homogeneity; b) the carbonate-to-phosphate [C/P] ratio as a relative measure of carbonate content in bioapatite crystals; and c) the amide-to-phosphate ratio [Am/P] for assessing the relative organic content preserved in bone. These thresholds are both extremely reliable and easy to apply for the successful and rapid distinction between well- and poorly-preserved specimens. This is a milestone for choosing appropriate samples prior to genomic and collagen analyses, with important implications for biomolecular archaeology and palaeontology.

Description

Keywords

Animals, Archaeology, Bone and Bones, DNA, Ancient, Fossils, Humans, Proteomics, Spectroscopy, Fourier Transform Infrared

Journal Title

PLoS One

Conference Name

Journal ISSN

1932-6203
1932-6203

Volume Title

15

Publisher

Public Library of Science (PLoS)