Tyrosine conversion to biologically important catecholamines

Biologically important catecholamine derivatives of tyrosine include L-DOPA, dopamine, noradrenaline (norepinephrine), and adrenaline (epinephrine). Illustration by LHcheM (2012). (Courtesy of Wikimedia Commons. Creative Commons Attribution-Share Alike 3.0 Unported License.)