has subject area Chemical Phenomena - Crystallization Chemistry Techniques, Analytical - Crystallization Chloroplast Proteins - Photosynthetic Reaction Center Complex Proteins Diagnostic Imaging - Image Enhancement Diagnostic Imaging - Microscopy, Electron Diagnostic Techniques and Procedures - Negative Staining Diagnostic Techniques and Procedures - Negative Staining Enzymes - Photosynthetic Reaction Center Complex Proteins Gram-Negative Aerobic Rods and Cocci - Rhodospirillum Image Processing, Computer-Assisted - Image Enhancement Investigative Techniques - Microscopy, Electron Investigative Techniques - Negative Staining Investigative Techniques - Negative Staining Membrane Proteins - Photosynthetic Reaction Center Complex Proteins Multiprotein Complexes - Photosynthetic Reaction Center Complex Proteins Rhodospirillales - Rhodospirillum