tetrahydrobiopterin catabolic process
tetrahydrobiopterin catabolic process
The chemical reactions and pathways resulting in the breakdown of tetrahydrobiopterin, the reduced form of biopterin (2-amino-4-hydroxy-6-(1,2-dihydroxypropyl)-pteridine). It functions as a hydroxylation coenzyme, e.g. in the conversion of phenylalanine to tyrosine.