3.7.1.8 degradation key determinant in the aerobic transformation of polychlorinated biphenyls by divergent biphenyl degraders 3.7.1.8 environmental protection potential enzyme resource for the biodegradation of biphenyl, bioremediation of the environmental pollution caused by biphenyl/polychlorinated biphenyls 3.7.1.8 molecular biology open reading frame corresponding to the pcbD gene consists of 855 base pairs with an ATG initiation codon and a TGA termination codon, able to encode a polypeptide with a molecular weight of 31732 containing 284 amino acid residues, deduced amino acid sequence has 62% identity with those of the HOPDA hydrolases of Pseudomonas putida KF715, P. pseudoalcaligenes KF707, and Burkholderia cepacia LB400, and also significant homology with those of other hydrolytic enzymes including esterase, transferase, and peptidase 3.7.1.8 molecular biology the deduced amino acid sequence of CarC shows 30.3, 31.3, and 31.8% identity with meta-cleavage compound hydrolases TodF, XylF, and DmpD, respectively, from other Pseudomonas 3.7.1.8 molecular biology upstream of bphC are five ORFs, including bphD, exhibiting low homology with, and a different gene order from, previously characterized bph genes