Abstract
Activities of carboxylesterase and malate dehydrogenase on membranes were retained after enzymes of mouse liver cytosol were separated by non-denaturing, two-dimensional electrophoresis (2-DE), stained using imidazole and zinc salts and electroblotted on to membranes. Furthermore, hydrolytic changes of phosphatidylcholine by the esterase were examined using matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF MS) after separation, and reversible staining and immobilization to membranes. Hydrolytic activity of the esterase on the membranes was 20% of the original activity of the tissue homogenate. The present method can be applied to the production of several types of enzyme reactors on membranes.
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