Abstract

An atomic level structural model of a bioenergetic pseudo-organelle, the chromatophore, is presented along with a stochastic spatiotemporal description of its function. The chromatophore is an intracytoplasmic membrane vesicle of 50-70 nm size found in purple bacteria, comprising of over a hundred proteins that cooperate to produce ATP by converting light energy. The primary function of the chromatophore is performed through the subprocesses of photon absorption, excitation energy transfer, charge separation, diffusion of electron carriers, and the generation of a proton-motive force, culminating, finally, in ATP synthesis.

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