378BENTROP , CAPOZZI , ANDLUCHINAT

FIG. 6. X-ray structures of Rieske cluster domains in three different proteins: (A) naphthalene-1,2-dioxygenase (PDB code 1NDO); (B) bovine heart bc± complex (PDB code 1RIE); (C) spinach b6f complex (PDB code 1RFS).