Bifunctional enzyme that catalyzes the decarboxylation of L-phenylalanine to 2-phenylethylamine, which is then oxidized to form 2-phenylacetaldehyde, a constituent of floral scent (PubMed:21284755, PubMed:23204519). 2-phenylacetaldehyde is a precursor of 2-phenylethanol, another constituent of floral scent (PubMed:21284755). Catalyzes both the decarboxylation and deamination of L-dopa to 3,4-dihydroxylphenylacetaldehyde (DHPAA) (PubMed:21284755). H(+) + H2O + L-phenylalanine + O2 = 2-phenylacetaldehyde + CO2 + H2O2 + NH4(+) H(+) + H2O + L-dopa + O2 = 3,4-dihydroxyphenylacetaldehyde + CO2 + H2O2 + NH4(+) Homodimer. Expressed in roots, rosette leaves, stems, cauline leaves and flowers. Induced by wounding and methyl jasmonate in leaves. Belongs to the group II decarboxylase family.