title: Fractionation of ribosomal particles from Bacillus subtilis.
mesh_terms: D001412:Bacillus subtilis / Q000648:ultrastructure*; D002458:Cell Fractionation / Q000379:methods; D002499:Centrifugation, Density Gradient / Q000379:methods; D002501:Centrifugation, Zonal; D008274:Magnesium; D012270:Ribosomes / Q000648:ultrastructure*
chemical_list: D008274:Magnesium