title: Structural order in chromatophore membranes of Rhodospirillum rubrum.
mesh_terms: D020130:Bacterial Chromatophores / Q000648:ultrastructure*; D008566:Membranes / Q000648:ultrastructure; D012247:Rhodospirillum rubrum / Q000648:ultrastructure*; D014867:Water; D014961:X-Ray Diffraction
chemical_list: D014867:Water