This family of proteins is related to P87064 a DOPA 4,5-dioxygenase that is involved in synthesis of betalain. DOPA-dioxygenase is the key enzyme involved in betalain biosynthesis. It converts 3,4-dihydroxyphenylalanine to betalamic acid, a yellow chromophore.
Hinz UG, Fivaz J, Girod PA, Zyrd JP.
The gene coding for the DOPA dioxygenase involved in betalain biosynthesis in Amanita muscaria and its regulation.
Mol. Gen. Genet. 256 1997 1-6
[PubMed: 9341673] http://dx.doi.org/10.1007/s004380050539