Abstract
Dominican Republic amber from the Oligo-Miocene epoch, 20–40 million years ago, was interrogated for residual protein. Tandem mass spectrometric analysis of trypsin digests of proteins from two silver-stained bands excised from SDS-PAGE led to the identification of 84 peptides from 19 Saccharomyces proteins. All peptides were identified from one high molecular weight gel band, suggesting a high degree of cross-linking of these proteins. This study reports the first experimental data on the identification of prehistoric proteins from amber.
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