https://www.ncbi.nlm.nih.gov/Structure/pdb/2XSH
2XSH: CRYSTAL STRUCTURE OF P4 VARIANT OF BIPHENYL DIOXYGENASE FROM BURKHOLDERIA XENOVORANS LB400 IN...
BIPHENYL DIOXYGENASE SUBUNIT ALPHABIPHENYL DIOXYGENASE SUBUNIT BETA2,6-DICHLOROBIPHENYLFE (II) IONFE2/S2 (INORGANIC) CLUSTER