Abstract
Five acetylcholinesterase isozymes from electric eel eletroplax ( Electrophorus electricus) and four from housefly brain ( Musca domestica L.), were separated by polyacrylamide gel electrophoresis combined with specific substrate staining and gel scanning procedures. The K m values for acetylthiocholine varied over a 2.4-fold range for eel and a 4.2-fold range for housefly. The sensitivities to inhibition also varied: for eel, the range was 2.2-fold for malaoxon, 2.6-fold for Tetram and 2.1-fold for eserine. The corresponding values for housefly were 2.3, 1.5, and 1.9.
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