Reaction catalyzed by 4-O-dimethylallyl-L-tyrosine synthase (2.5.1.122)
+
=
+
dimethylallyl diphosphate
+
3,4-dihydroxy-L-phenylalanine
=
diphosphate
+
3-hydroxy-4-dimethylallyloxy-L-phenylalanine