title: Ribosomal proteins. XXI. Amino acid composition of the tryptic peptides isolated from proteins S4, S18 and S20 of Escherichia coli ribosomes.
mesh_terms: D000596:Amino Acids / Q000032:analysis*; D001426:Bacterial Proteins / Q000302:isolation & purification*; D055598:Chemical Phenomena; D002621:Chemistry; D002845:Chromatography; D002854:Chromatography, Paper; D004926:Escherichia coli / Q000032:analysis*; D008970:Molecular Weight; D010455:Peptides / Q000302:isolation & purification*; D012270:Ribosomes / Q000032:analysis*; D014357:Trypsin / Q000032:analysis
chemical_list: D000596:Amino Acids; D001426:Bacterial Proteins; D010455:Peptides; D014357:Trypsin