Topic summaryDopamine β-hydroxylase Expand Summary Extracted from the Wikipedia article Dopamine beta-hydroxylase. Dopamine β-hydroxylase (DBH), also known as dopamine β-monooxygenase, is an enzyme (EC1.14.17.1) that in humans is encoded by the DBH gene. Dopamine β-hydroxylase catalyzes the conversion of dopamine to norepinephrine. Wikipedia source