Abstract
Immunohistochemistry is an important tool in the investigation of ancient mummified remains because of its ability not only to detect proteins but also to isolate their location to specific tissues and thereby improve confidence that the results are genuine. A mouse model of Egyptian mummification has been used to demonstrate that the survival of proteins, judged by the retention of immunohistochemical staining, varies markedly. Some survive the process well, whereas others become barely detectable despite the morphology of the tissue being excellently preserved. The results obtained show that protein preservation is multi-factorial, with tissue type and degradation, and the properties of the protein itself all having significant effects. Proteins forming large, multi-subunit complexes such as collagen IV appear to be more resistant to degradation than those that do not, such as S-100. Although modern modelling studies cannot replicate the full extent of degradative processes and taphonomic changes experienced by real mummies, the results obtained can be useful for guiding research that requires ancient tissues.
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