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Abstract
Extracts from freshly harvested tubers of potato (Solanum tuberosum L.) held at different temperatures and extracts taken from stored tubers were examined by starch gel electrophoresis. Storage of tubers at 10°C for up to 70 days or storage of extracts at −60° for 70 days did not affect isozyme banding patterns. Storage of fresh extracts for 14 days at 5° produced blurring of alkaline phosphatase (AKP) bands, altered isozyme mobility of malic enzyme, and added a band to glucosephosphateisomerase (GPI) zymograms. It did not affect the mobility or resolution of 6-phosphogluconate dehydrogenase. Addition of 0.1 m mercaptoethanol did not restore original resolutions or mobilities.