Ovaj enzim je flavoprotein (FAD). Većina enzima iz Pseudomonas su visoko specifični za NADPH (cf. EC 1.14.13.33, 4-hidroksibenzoat 3-monooksigenaza [NAD(P)H]).
↑Hosokawa, K. and Stanier, R.Y. (1966). "Crystallization and properties of p-hydroxybenzoate hydroxylase from Pseudomonas putida". J. Biol. Chem.241: 2453–2460. PMID4380381.
↑Howell, L.G., Spector, T. and Massey, V. (1972). "Purification and properties of p-hydroxybenzoate hydroxylase from Pseudomonas fluorescens". J. Biol. Chem.247: 4340–4350. PMID4402514.
↑Spector, T. and Massey, V. (1972). "Studies on the effector specificity of p-hydroxybenzoate hydroxylase from Pseudomonas fluorescens". J. Biol. Chem.247: 4679–4687. PMID4402938.
↑Spector, T. and Massey, V. (1972). "p-Hydroxybenzoate hydroxylase from Pseudomonas fluorescens. Evidence for an oxygenated flavin intermediate". J. Biol. Chem.247: 5632–5636. PMID4403446.
↑Spector, T. and Massey, V. (1972). "p-Hydroxybenzoate hydroxylase from Pseudomonas fluorescens. Reactivity with oxygen". J. Biol. Chem.247: 7123–7127. PMID4404745.
↑Seibold, B., Matthes, M., Eppink, M.H., Lingens, F., Van Berkel, W.J. and Muller, R. (1996). "4-Hydroxybenzoate hydroxylase from Pseudomonas sp. CBS3. Purification, characterization, gene cloning, sequence analysis and assignment of structural features determining the coenzyme specificity". Eur. J. Biochem.239: 469–478. PMID8706756.