tetrahydrobiopterin, bh4, thb, sapropterin molecule. it has role as coenzyme, diagnostic agent, human metabolite, cofactor.

atom atomic bh4 biopterin carbon chemical chemistry coenzyme cofactor diagnostic diol drawing enzyme flat formula hydrogen hydroxylase hyperphenylalaninemia icon illustration metabolite molecular molecule nitrogen organic oxygen phenylalanine sapropterin structural structure tetrahydrobiopterin thb vector