Dopamine-beta-Hydroxylase (DBH), Dopamine can be transformed into Noradrenalin. Conversion of dopamine to noradrenaline. [SUBUNIT] Homotetramer composed of two non-covalently bound disulfide-linked dimers. [SUBCELLULAR LOCATION] Soluble dopamine beta-hydroxylase: Cytoplasmic vesicle, secretory vesicle lumen. Cytoplasmic vesicle, secretory vesicle, chromaffin granule lumen. Cytoplasmic vesicle, secretory vesicle membrane; Single-pass type II membrane protein. Cytoplasmic vesicle, secretory vesic