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dc.contributor.authorCollins, Matthew J
dc.contributor.authorPenkman, Kirsty EH
dc.contributor.authorRohland, Nadin
dc.contributor.authorShapiro, Beth
dc.contributor.authorDobberstein, Reimer C
dc.contributor.authorRitz-Timme, Stefanie
dc.contributor.authorHofreiter, Michael
dc.date.accessioned2018-12-07T00:30:59Z
dc.date.available2018-12-07T00:30:59Z
dc.date.issued2009-08-22
dc.identifier.issn0962-8452
dc.identifier.urihttps://www.repository.cam.ac.uk/handle/1810/286393
dc.description.abstractMany rare and valuable ancient specimens now carry the scars of ancient DNA research, as questions of population genetics and phylogeography require larger sample sets. This fuels the demand for reliable techniques to screen for DNA preservation prior to destructive sampling. Only one such technique has been widely adopted: the extent of aspartic acid racemization (AAR). The kinetics of AAR are believed to be similar to the rate of DNA depurination and therefore a good measure of the likelihood of DNA survival. Moreover, AAR analysis is only minimally destructive. We report the first comprehensive test of AAR using 91 bone and teeth samples from temperate and high-latitude sites that were analysed for DNA. While the AAR range of all specimens was low (0.02-0.17), no correlation was found between the extent of AAR and DNA amplification success. Additional heating experiments and surveys of the literature indicated that d/l Asx is low in bones until almost all the collagen is lost. This is because aspartic acid is retained in the bone within the constrained environment of the collagen triple helix, where it cannot racemize for steric reasons. Only if the helix denatures to soluble gelatin can Asx racemize readily, but this soluble gelatine is readily lost in most burial environments. We conclude that Asx d/l is not a useful screening technique for ancient DNA from bone.
dc.format.mediumPrint-Electronic
dc.languageeng
dc.publisherThe Royal Society
dc.rightsAttribution 4.0 International
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.subjectBone and Bones
dc.subjectAnimals
dc.subjectBison
dc.subjectAmino Acids
dc.subjectDNA
dc.subjectProtein Denaturation
dc.subjectArchaeology
dc.subjectPaleontology
dc.titleIs amino acid racemization a useful tool for screening for ancient DNA in bone?
dc.typeArticle
prism.endingPage2977
prism.issueIdentifier1669
prism.publicationDate2009
prism.publicationNameProc Biol Sci
prism.startingPage2971
prism.volume276
dc.identifier.doi10.17863/CAM.33705
rioxxterms.versionofrecord10.1098/rspb.2009.0563
rioxxterms.versionVoR
rioxxterms.licenseref.urihttp://www.rioxx.net/licenses/all-rights-reserved
rioxxterms.licenseref.startdate2009-08
dc.contributor.orcidCollins, Matthew [0000-0003-4226-5501]
dc.identifier.eissn1471-2970
rioxxterms.typeJournal Article/Review
pubs.funder-project-idNatural Environment Research Council (NE/G000204/1)
cam.issuedOnline2009-06-03


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Attribution 4.0 International
Except where otherwise noted, this item's licence is described as Attribution 4.0 International