1C51 PHOTOSYNTHESIS/ELECTRON TRANSPORT, PHOTOSYNTHESIS, PHOTOSYNTHETIC REACTION CENTER, OXYGENIC PHOTOSYNTHESIS, CORE- ANTENNA LIGHT-HARVESTING SYSTEM, THERMOPHILIC CYANOBACTERIUM, HELIX-BUNDLE MEMBRANE PROTEIN, PHOTOSYNTHESIS/ELECTRON TRANSPORT COMPLEX PHOTOSYNTHETIC REACTION CENTER AND CORE ANTENNA SYSTEM (TRIMERIC), ALPHA CARBON ONLY