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AbstractPseudomonas pseudoalcaligenes strain POB310 degrades 3- and 4-carboxydiphenyl ether. The initial reaction involves an angular dioxygenation yielding an unstable hemiacetal that spontaneously decays to phenol and protocatechuate. We cloned a DNA fragment containing the gene encoding the initial dioxygenase from an unstable, self-transmissible plasmid. Sequence analysis revealed two open reading...