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1 Department of Pharmacology, School of Medicine, University of Virginia, Charlottesville, Va.
Morphine, codeine, meperidine, and methadon inhibit the oxidation of succinate by brain homogenate. Spectrographic data showed these drugs prevent the reduction of cytochrome c by the enzyme preparation and succinate indicating the block occurred at the dehydrogenase or an unknown factor. The inhibition of the oxidation of p-phenylenediamine by methadon shows blockage also occurs at the cytochrome-cytochrome oxidase level.
Submitted on October 13, 1948