Fig. 4.

Mobility and diffusion pathways of electron carriers in the cellular membrane. A, Fluorescence recovery after photobleaching of living E. coli cells incubated with NBDHA-Q indicated the ubiquinone mobility in bacterial membrane. For details, see [79]. B, Network of quinone pathways within the entire intracytoplasmic photosynthetic membranes from purple photosynthetic bacteria. Overview atomic force microscopy images and molecular-resolution images of typical photosynthetic protein assemblies of the native photosynthetic membranes from Rhodospirillum photometricum revealed specific protein organization and crowding in photosynthetic membranes, which are the fundamental basis of the long-range quinone pathways in cellular membranes. For details, see [73].