MAO and Schizophrenia Monoamine oxidase (MAO) is an enzyme that is
thought to play a role in the regulation of behavior. To see whether
different categories of schizophrenic patients have different levels
of MAO activity, researchers collected blood specimens from 42
patients and measured the MAO activity in the platelets. Values are
expressed as nmol benzylaldehyde product per 108 platelets per hour.