In purple photosynthetic bacteria, the light-harvesting core antenna (LH1) and the reaction center (RC) form a supramolecular complex (LH1-RC). The crystal structure of the LH1-RC complex from Thermochromatium tepidum was determined at a resolution of 3.0 Å. The RC is completely surrounded by the LH1 ring which is composed of 16 αβ-heterodimers. The atomic structure enables us to meet further challenge to elucidating the mechanism of color tuning, excited energy transfer and ubiquinone shuttling in the bacterial photosystem.
This review describes recent our studies on artificial cell membranes (lipid bilayers) and their applications using microfabrication technologies. The stable and reproducible lipid bilayer formation can be achieved by “droplet contact method” which is readily created the lipid bilayer by contacting two lipid monolayers at the interface of the droplets. This method will be a powerful tool for the high-throughput ion channel measurements and biomimetic sensors.