7.1.1.3	Cu2+	the pure four-subunit enzyme contains one equivalent of copper (7.5 ng/mg)	714129	
7.1.1.3	Cu2+	the ubiquinol oxidase cytochrome b03 of Escherichia coli is a member of the respiratory heme-copper oxidase family	714135	
7.1.1.3	Fe	the pure four-subunit enzyme contains two equivalents of iron (19.5 ng/mg)	714129	
7.1.1.3	additional information	the enzyme contains no zinc. The equivalent of CuA of the aa3-type cytochrome c oxidases is absent in this quinol oxidase	714129