title: A simplified high-resolution gradient analysis system.
mesh_terms: D002499:Centrifugation, Density Gradient / Q000295:instrumentation*; D008722:Methods; D011138:Polytetrafluoroethylene; D012313:RNA; D013056:Spectrophotometry, Ultraviolet
chemical_list: D012313:RNA; D011138:Polytetrafluoroethylene