On the Significance of Two-Dimensional Super-Structures in Biomembranes for Energy-Transfer and Signal Conversion
The most evident two-dimensional super-structure so far determined in biomembranes is found in photosynthetic bacteria. Figure 1 shows an example of an electronmicroscopic picture of the bacterium Rhodopseudomonas viridis by Giessrecht and Drews . The whole membrane surface is covered with double chained super-structures consisting of protein strands in a two-dimensional association, forming several dislocation areas in the membrane surface. Fig. 1 b gives a plane view of membranes of the same object in a different state as obtained by Fritz, Göbel and Kreutz. In this state corpuscular protein particles are attached onto the matrix in a hexagonal crystalline lattice arrangement. Apparently, the matrix protein strands of Fig. l a define the coordination loci (binding sites) for the protein particles seen in Fig. 1 b. The photosynthetic membrane of the higher plants also shows such combinations of linear super-structures and attached corpuscular particles in orthogonal arrangements. In an earlier paper a detailed discussion of these structural viewpoints was given .
KeywordsOuter Segment Signal Conversion Linear Lattice Double Spiral Bleaching Rate
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