title: Fractionation by density gradient centrifugation of membranous organella of Bacillus megaterium.
mesh_terms: D001410:Bacillus megaterium / Q000032:analysis* / Q000201:enzymology; D002462:Cell Membrane / Q000032:analysis; D002499:Centrifugation, Density Gradient; D006651:Histocytochemistry; D008854:Microscopy, Electron