title: Primary structure heterogeneity in ribosomal proteins from Escherichia coli.
mesh_terms: D000596:Amino Acids / Q000032:analysis; D001426:Bacterial Proteins / Q000032:analysis*; D002852:Chromatography, Ion Exchange; D004586:Electrophoresis; D004926:Escherichia coli / Q000166:cytology*; D008747:Methylcellulose; D012270:Ribosomes / Q000032:analysis*; D014357:Trypsin
chemical_list: D000596:Amino Acids; D001426:Bacterial Proteins; D008747:Methylcellulose; D014357:Trypsin