Abstract
Myoglobin, ovalbumin and serum albumin have been irradiated in aqueous solution in the presence of varying amounts of carbohydrates and lipids, simulating a model food. Gel chromatography revealed the induction of protein aggregates, the formation of which depended strongly on protein concentration. The addition of carbohydrates (trehalose, starch) greatly reduced the amount of radiation-induced aggregates, whereas the addition of lipids (sunflower oil) had practically no effect on aggregate formation. However, if both carbohydrates and lipids were added, the decrease in aggregation caused by the carbohydrate addition was counteracted by the addition of the lipid; as increasing amounts of lipid were added, the effect of carbohydrate addition became smaller.
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