The orientation of the three haems of the 'in situ' ubiquinol oxidase, cytochrome bd, of Escherichia coli.

The Escherichia coli cytochrome bd complex incorporates three haems as prosthetic groups. In the ferric form these are a predominantly high-spin chlorin (haem d), a high-spin haem b (b595) and a low-spin haem b (b558). The orientations of these three haems have been determined by e.p.r. studies on oriented multilayer preparations of cytoplasmic membrane… (More)