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Each amino acid has two chemical groups, an amino group and a carboxyl group, which can form chemical bonds with other amino acids.
) in the southeastern Barents Sea for the purpose of comparing age estimates obtained by 3 different methods, the traditional technique of counting growth layer groups (GLGs) in teeth and 2 novel approaches, aspartic acid racemization (AAR) in eye lens nuclei and telomere sequence analyses as a proxy for telomere length.
A significant correlation between age estimates obtained using GLGs and AAR was found, whereas no correlation was found between GLGs and telomere length.
Asp racemization thus provides a means of dating recent faunal assemblages of molluscs and other biogenic carbonates, as well as recent terrestrial, fluvial and marine sedimentary sequences that contain molluscs.
At a widely publicized news conference in August of 1972, Dr.