- 4-Chlorocatechol 1,2-dioxygenase from the chlorophenol-utilizing Gram-positive Rhodococcus opacus 1CP: crystallization and preliminary crystallographic analysis. Ferraroni, M., Ruiz Tarifa, M.Y., Briganti, F., Scozzafava, A., Mangani, S., Solyanikova, I.P., Kolomytseva, M.P., Golovleva, L. Acta Crystallogr. D Biol. Crystallogr. (2002)