The function of Ensembl gene identifier ENSG00000123454 (DBH, dopamine beta-hydroxylase) is as follows. Catalyzes the hydroxylation of dopamine to noradrenaline (also known as norepinephrine), and is thus vital for regulation of these neurotransmitters. {ECO:0000269|PubMed:27148966, ECO:0000269|PubMed:3443096, ECO:0000269|PubMed:7961964, ECO:0000269|PubMed:8546710}.