The architecture and function of the light-harvesting apparatus of purple bacteria: from single molecules to in vivo membranes

1. Introduction 229 2. Structures 234 2.1 The structure of LH2 234 2.2 Natural variants of peripheral antenna complexes 242 2.3 RC–LH1 complexes 242 3. Spectroscopy 249 3.1 Steady-state spectroscopy 249 3.2 Factors which affect the position of the Q y absorption band of Bchl a 249 4. Regulation of biosynthesis and assembly 257 4.1 Regulation 257 4.1.1 Oxygen 257 4.1.2 Light 258 4.1.2.1 AppA: blue-light-mediated regulation 259 4.1.2.2 Bacteriophytochromes 259 4.1.3 From the RC to the mature PSU 261 4.2 Assembly 261 4.2.1 LH1 262 4.2.2 LH2 263 5. Frenkel excitons 265 5.1 General 265 5.2 B800 267 5.3 B850 267 5.4 B850 delocalization 273 6. Energy-transfer pathways: experimental results 274 6.1 Theoretical…