Rate limiting enzyme in catecholamine biosynthesis is
Tyrosine Hydroxylase Is Rate-Limiting for Catecholamine BiosynthesisRef: Harper&;s Biochemistry; 30th edition; Chapter 41; The Diversity of the Endocrine System
Tyrosine hydroxylase
Dopa Decarboxylase
Dopamine beta-hydroxylase (DBH)
Phenylethanolamine-N-Methyltransferase (PNMT)
Endocrinology