14C dating of bone using (gamma) Carboxyglutamic Acid and Carboxyglycine (Aminomalonate)

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Radiocarbon determinations have been obtained on {gamma}-carboxyglutamic acid [Gla] and {alpha}-carboxyglycine (aminomalonate) [Am] as well as acid- and base-hydrolyzed total amino acids isolated from a series of fossil bones. As far as they are aware, Am has not been reported previously in fossil bone and neither Gla nor Am {sup 14}C values have been measured previously. Interest in Gla, an amino acid found in the non-collagen proteins osteocalcin and matrix Gla-protein (MGP), proceeds from the suggestion that it may be preferentially retained and more resistant to diagenetic contamination affecting {sup 14}C values in bones exhibiting low and trace amounts of ... continued below

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Southon, J R; Burky, R T; Kirner, D L; Taylor, R E & Hare, P E April 27, 1999.

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Radiocarbon determinations have been obtained on {gamma}-carboxyglutamic acid [Gla] and {alpha}-carboxyglycine (aminomalonate) [Am] as well as acid- and base-hydrolyzed total amino acids isolated from a series of fossil bones. As far as they are aware, Am has not been reported previously in fossil bone and neither Gla nor Am {sup 14}C values have been measured previously. Interest in Gla, an amino acid found in the non-collagen proteins osteocalcin and matrix Gla-protein (MGP), proceeds from the suggestion that it may be preferentially retained and more resistant to diagenetic contamination affecting {sup 14}C values in bones exhibiting low and trace amounts of collagen. The data do not support these suggestions. The suite of bones examined showed a general tendency for total amino acid and Gla concentrations to decrease in concert. Even for bones retaining significant amounts of collagen, Gla (and Am extracts) can yield {sup 14}C values discordant with their expected age and with {sup 14}C values obtained on total amino-acid fractions isolated from the same bone sample.

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1112 Kilobytes pages

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  • 16th International 14C Conference, Gronningen (NL), 06/16/1997--06/21/1997

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  • Report No.: UCRL-JC-134031
  • Report No.: YN0100000
  • Grant Number: W-7405-ENG-48
  • Office of Scientific & Technical Information Report Number: 757416
  • Archival Resource Key: ark:/67531/metadc709469

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  • April 27, 1999

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  • Sept. 12, 2015, 6:31 a.m.

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  • May 5, 2016, 8:59 p.m.

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Southon, J R; Burky, R T; Kirner, D L; Taylor, R E & Hare, P E. 14C dating of bone using (gamma) Carboxyglutamic Acid and Carboxyglycine (Aminomalonate), article, April 27, 1999; California. (digital.library.unt.edu/ark:/67531/metadc709469/: accessed October 22, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.