Protein and enzyme polymorphisms in affective disorders in Northern Greece.

The phenotypes and gene frequencies of eight enzyme and three protein systems were electrophoretically determined in 225 patients with affective disorders, 95 of which were suffering from schizophrenia. In five polymorphic systems studied, no significant differences were found between the gene frequencies of the total sample and the normal controls and between the schizophrenic group and either the total sample or the controls.