Bacterial Proteins Cell Fractionation Cell Membrane Chlorophyll Rhodopseudomonas microorganism rhodopseudomonas viridis theoretical study Cell-Free System Centrifugation, Density Gradient Chromatography, Thin Layer Comparative Study Culture Media DNA, Bacterial Dialysis Electrophoresis Evaluation Studies Fatty Acids Lipid and Protein Composition Lipids Methods Ornithine Phosphorus Photosynthetic Membrane RNA, Bacterial Reaction Center Saccharomyces cerevisiae Spectrophotometry, Ultraviolet Vibration bacterial cell wall