Abstract
Plasmodial homogenates of the true slime mold Physarum polycephalum grown on a liquid medium contain carbohydrates which form a complex with protein under conditions of acrylamide electrophoresis and thus make isoenzyme studies from those extracts impossible. A method, using mild homogenization and centrifugation on top of a 30% sucrose solution was developed. This treatment leaves most of the soluble cytoplasmic enzymes in the upper layer above the sucrose, which then can be used for successful isoenzyme or protein studies with polyacrylamide electrophoresis.
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