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The structural intactness of many biopolymers in mummified tissues is well documented. By way of contrast no functional evidence of an isolated protein is known. The well defined air dried mummy of a deceased 16±2 year male teenager 1200 B. C. prompted us to search for the possible presence and function of Cu 2 Zn 2 superoxide dismutase or remnants thereof. Using two different assay systems unequivocal proof of a specific Cu 2 Zn,superoxide dismutase activity in brain extract was demonstrated. Fast protein liquid chromatography of the extract on Superose 12 revealed an approx. 5 kD Cu-containing polypeptide to which activity was assigned. It is assumed that during the ageing process considerable portions of the 31.3 kD homodimer were cleaved leaving this active core up to the present date. This would be the first case of the presence of an enzymically active component surviving the past 3000 years of mummification.

Cu 2 Zn 2 Superoxide Dismutase Activity in an Air Dried Egyptian Mummy of the New Kingdom