The diagenetic production of α-keto acids in heated and fossil Chione shells |
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| Authors: | Spencer M Steinberg Jeffrey L Bada |
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| Institution: | Amino Acid Dating Laboratory, Scripps Institution of Oceanography, University of California, San Diego, La Jolla, California 92093 USA |
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| Abstract: | Both pyruvic and α-ketobutyric acids are formed during heating experiments with modern Chione shells. These α-keto acids are also present in fossil specimens. These findings provide additional evidence that the dehydration reaction of free serine and threonine or the β-elimination reaction of peptide bound serine and threonine occurred in fossil materials. These experiments suggest that the formation of α-keto acids occurs early in protein diagenesis. A large fraction of the α-keto acids which were formed have been lost either by subsequent reactions or by diffusion out of the shell matrix. |
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