By E. C. Slater (auth.), S. Papa, B. Chance, L. Ernster (eds.)

This quantity relies at the lawsuits of a world Symposium on "Cytochrome structures: Molecular Biology and Bioenergetics" that was once held at Selva di Fasano close to Bari, Italy, among April 7 and 11,1987. It includes papers masking the topics mentioned on the Symposium, contributed either via contributors of the assembly and via a few invited audio system who weren't capable of attend. the purpose of the Symposium was once to collect specialists in numerous rese­ arch thoughts presently being utilized to the examine of cytochrome platforms, together with molecular genetics, protein chemistry, enzymology of electron move and protonmotive task in energy-transducing organic mem­ branes. as a result of the excessive measure of complexity of cytochrome platforms and the expanding sophistication lately of different experimen­ tal methods, there was a starting to be specialization - occasionally even an inclination to "over-specialization" - between scientists operating during this box. This in itself appeared to justify a gathering the place representatives of assorted disciplines might alternate their effects and speak about their conclusions. additionally, and even perhaps extra importantly, it was once felt that conferences of this sort provide a chance for a "cross-fertilization" of techniques and ideas between representatives of varied fields of technological know-how. the current assembly proved to be an plentiful representation of the good fortune of such an inter­ action.

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198: 1-6 (1984). 4. R. L. Lorence, G. N. Green, and R. B. Gennis, Potentiometric Analysis of the Cytochromes of E. coli Utilizing a Mutant Strain Lacking the Cytochrome d Terminal Oxidase Complex, J. , 157:115-121 (1984). 20 5. Y. Anraku, and R. B. Gennis, The Aerobic Respiratory Chain of Escherichia coli, Trends in Biochem. , in press (1987). 6. W. J. Ingledew, and R. K. Poole, The Respiratory Chains of Escherichia coli, Microbiol. , 48:222-271 (1984). 7. M. J. Miller, and R. B. Gennis, The Cytochrome d Complex is a Coupllng Site in the Aerobic Respiratory Chain of Escherichia COIl, J.

R. L. Lorence, G. N. Green, and R. B. Gennis, Potentiometric Analysis of the Cytochromes of E. coli Utilizing a Mutant Strain Lacking the Cytochrome d Terminal Oxidase Complex, J. , 157:115-121 (1984). 20 5. Y. Anraku, and R. B. Gennis, The Aerobic Respiratory Chain of Escherichia coli, Trends in Biochem. , in press (1987). 6. W. J. Ingledew, and R. K. Poole, The Respiratory Chains of Escherichia coli, Microbiol. , 48:222-271 (1984). 7. M. J. Miller, and R. B. Gennis, The Cytochrome d Complex is a Coupllng Site in the Aerobic Respiratory Chain of Escherichia COIl, J.

However, the absence of a functional bel complex does not abolish respiration becallfi of the presence of a oc 1 -independent, "alternate" respiratory pathway (Pig. 1). The availability of several bc l mutants affecting various components of this complex in concert with monoclonal and polyclonal antibodies will be very useful for studies aimed at the understanding of the biogenesis and the assembly of the bel complex. Although the prosthetic groups (Pe-S cluster, e heme and the two spectrally distinct b hemes) of the cytochrome be complex can be assigned with some confidence to their binding sites on tteir respective apoproteins it is currently difficult to identify the quinone processing sites.

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