title: Physical and functional heterogeneity of ribosomal proteins.
mesh_terms: D002499:Centrifugation, Density Gradient; D004492:Edetic Acid; D004586:Electrophoresis; D004926:Escherichia coli / Q000166:cytology*; D066298:In Vitro Techniques; D009698:Nucleoproteins / Q000032:analysis*; D012270:Ribosomes / Q000032:analysis*
chemical_list: D009698:Nucleoproteins; D004492:Edetic Acid