Biological process

5,6,7,8-tetrahydrobiopterin biosynthetic process, tetrahydrobiopterin anabolism, tetrahydrobiopterin biosynthesis, tetrahydrobiopterin formation, tetrahydrobiopterin synthesis

The chemical reactions and pathways resulting in the formation 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.