pig liver and pig brain mitochondrial monoamine oxidase were inhibited by increasing concentrations of clorgyline ( selective inhibitor for the `` '' a '' '' form of monoamine oxidase ) and deprenil ( selective inhibitor for the `` '' b '' '' form of the enzyme ) and the activities were then estimated with serotonin , tyramine and beta-phenylethylamine as substrates .
C0006104
brain
C0086045
concentrations