title: Several crystal forms of the Bacillus stearothermophilus 50 S ribosomal particles.
mesh_terms: D055598:Chemical Phenomena; D002621:Chemistry; D003460:Crystallization; D001411:Geobacillus stearothermophilus / Q000648:ultrastructure*; D008854:Microscopy, Electron; D012270:Ribosomes / Q000648:ultrastructure*; D014961:X-Ray Diffraction