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The dopamine transporter ( DAT ) is a sodium - coupled symporter protein responsible for modulating the concentration of extraneuronal dopamine in the brain .
 Chemical: dopamine; Chemical: sodium; Chemical: dopamine
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: dopamine; Chemical: sodium; Chemical: dopamine