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[Interaction of genetic and environmental components in the determination of tryptophan hydroxylase activity in the mouse brain in stress].

The interaction between genetic and environmental components of phenotype variety in the response to cold and emotional stress of the brain serotonin system was studied in 11 inbred strains of mice. It was shown that the variety in the degree of tryptophan hydroxylase activity's changes under stress are mainly due to the genotypic differences. The presence of different genotypic systems controlling the activity of tryptophan hydroxylase under basal conditions and under stress was revealed. Differences in hereditary mechanisms determining the tryptophan hydroxylase reactions to different kinds of stress were noted.