title: Separation of capsulate and non-capsulate Bacteroides fragilis on a discontinuous density gradient.
mesh_terms: D001441:Bacteroides fragilis / Q000032:analysis / Q000166:cytology / Q000302:isolation & purification*; D002499:Centrifugation, Density Gradient; D011135:Polysaccharides, Bacterial / Q000032:analysis*
chemical_list: D011135:Polysaccharides, Bacterial