title: Separation of spores and parasporal crystals of Bacillus thuringiensis in gradients of certain x-ray contrasting agents.
abstract: Spores and parasporal crystals of Bacillus thuringiensis can be separated at moderate centrifugation speeds (10,000 to 12,000 rpm) in gradients of Renografin or sodium diatrizoate.
mesh_terms: D001413:Bacillus thuringiensis / Q000302:isolation & purification*; D002499:Centrifugation, Density Gradient / Q000379:methods*; D003461:Crystallography; D003973:Diatrizoate; D013171:Spores, Bacterial / Q000302:isolation & purification*
chemical_list: D003973:Diatrizoate