- Purification of 3,5-dichlorocatechol 1,2-dioxygenase, a nonheme iron dioxygenase and a key enzyme in the biodegradation of a herbicide, 2,4-dichlorophenoxyacetic acid (2,4-D), from Pseudomonas cepacia CSV90. Bhat, M.A., Ishida, T., Horiike, K., Vaidyanathan, C.S., Nozaki, M. Arch. Biochem. Biophys. (1993)