1.14.16.2 tyrosine 3-monooxygenase catecholamine biosynthesis - 1.14.16.2 tyrosine 3-monooxygenase catecholamine biosynthesis catecholamine biosynthesis 1.14.17.1 dopamine beta-monooxygenase catecholamine biosynthesis - 1.14.17.1 dopamine beta-monooxygenase catecholamine biosynthesis catecholamine biosynthesis 2.1.1.28 phenylethanolamine N-methyltransferase catecholamine biosynthesis - 2.1.1.28 phenylethanolamine N-methyltransferase catecholamine biosynthesis catecholamine biosynthesis 4.1.1.28 aromatic-L-amino-acid decarboxylase catecholamine biosynthesis - 4.1.1.28 aromatic-L-amino-acid decarboxylase catecholamine biosynthesis catecholamine biosynthesis