DBH is a symbol for the gene, Dopamine beta-hydroxylase (dopamine beta-monooxygenase), in humans. Other names include: Dopamine beta-hydroxylase; Dopamine beta-monooxygenase; Dopamine beta-hydroxylase . The encoded protein is an enzyme with an amino acid length of 617 and a mass of 69.1 kDa. Other isoforms may exist. DBH is a member of the Copper type II ascorbate-dependent monooxygenase family. This gene shares homology with other species, including: Mouse.