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• More commonly associated with the behavioural symptoms of OCD, such as repetitive actions
• Research suggests that people with OCD often have excessive dopamine in certain brain regions
• Involved in regulating dopamine levels in the brain​

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• This gene is also linked to other disorders, such as schizophrenia, which also involve dopamine regulation
• A mutation in this gene leads to higher dopamine activity​

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• igh dopamine levels are linked to compulsive behaviour and overactivity in the brain​