Isotopic comparison of hair, nail and bone: Modern analyses
Isotopic comparison of hair, nail and bone: Modern analyses
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DOI：
10.1006/jasc.2001.0698
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发表时间：
2001-11-01
影响因子：
2.8
通讯作者：
SImpson, AHR
中科院分区：
文献类型：
--
作者：
O'Connell, TC;Hedges, REM;SImpson, AHR
本文比较了居住在英国的8对头发角蛋白和骨胶原的同位素值，以及12对头发角蛋白和指甲角蛋白的同位素值，目的是研究现代人的同位素数据是否可以直接与考古同位素数据进行比较。结果表明，同一个体的骨胶原蛋白相对于头发角蛋白的富集程度，δ C-13和δ N-15分别比头发高1.4%和0.86%。头发角蛋白和骨胶原之间氨基酸组成的差异可能解释了这两种蛋白质之间的碳同位素差异，而头发和指甲之间的总体碳同位素差异不显著。然而，在这两对中，氮的同位素差异显著，氨基酸组成和周转时间的差异无法解释。我们认为，这些结果表明，即使是相似的蛋白质，组织之间同位素值的恒定也不能被认为是理所当然的。
This paper presents a comparison of the isotopic values of eight pairings of hair keratin and bone collagen and 12 pairings of hair keratin and nail keratin taken from living humans resident in the UK, with the aim of examining whether modern human isotopic data an be directly compared to archaeological isotopic data. Results showed that bone collagen was enriched relative to hair keratin from the same individual by + 1.4% in delta C-13 and + 0.86% in delta N-15 than hair. Differences in amino acid composition between hair keratin and bone collagen may account for the carbon isotopic differences between the two proteins, and there is no significant overall carbon isotopic difference between hair and nail. However there are significant isotopic differences for nitrogen in the two pairings, that differences in amino acid composition and turnover times cannot explain. We suggest that these results indicate that constancy of isotopic values between tissues, even for similar proteins, cannot be taken for granted.