Nicholas P. J. Cotton

TL;DR: The asymmetry of the dI:dIII complex suggests that in the intact enzyme there is an alternation of conformation at the catalytic sites associated with changes in nucleotide binding during proton translocation.

TL;DR: It is shown here that although chromatophore membranes of Rb.

TL;DR: Venturicidin behaves as an orthodox energy transfer inhibitor in intact cells of Rhodopseudomonas capsulata as judged by the following criteria: it led to inhibition of respiration, and inhibited the rise in cellular ATP concentration accompanying either photosynthesis or respiration.

TL;DR: Evidence that light-inhibition of respiration is mediated by delta psi is interpreted as evidence that uncoupling agents affect the response by uncouplers, inhibitors and with light intensity.

TL;DR: Data from chromatophores in illuminated and darkened suspensions are used in an attempt to discriminate between two models of energy transduction: (a) the driving force exerted by the membrane potential is mediated by a pH gradient formed through the operation of a proton well in the transhydrogenase; (b) the membranes potential increases a rate constant for charge translocation through transHydrogenase by decreasing the effective height of the Eyring barrier for charge transfer across the membrane through the enzyme.