title: Purification and characterization of a salt-unstable "50-S" ribonucleoprotein particle from Escherichia coli.
mesh_terms: D000535:Aluminum; D001426:Bacterial Proteins / Q000302:isolation & purification; D001665:Binding Sites; D002250:Carbon Radioisotopes; D002499:Centrifugation, Density Gradient; D004355:Drug Stability; D004591:Electrophoresis, Polyacrylamide Gel; D004926:Escherichia coli / Q000032:analysis* / Q000378:metabolism; D007553:Isotope Labeling; D046911:Macromolecular Substances; D008274:Magnesium; D009154:Mutation; D009698:Nucleoproteins / Q000302:isolation & purification; D009994:Osmolar Concentration; D010649:Phenylalanine / Q000378:metabolism; D011485:Protein Binding; D014176:Protein Biosynthesis; D012329:RNA, Bacterial / Q000302:isolation & purification; D012335:RNA, Ribosomal / Q000302:isolation & purification; D012270:Ribosomes / Q000378:metabolism; D013056:Spectrophotometry, Ultraviolet; D014316:Tritium; D014498:Uracil
chemical_list: D001426:Bacterial Proteins; D002250:Carbon Radioisotopes; D046911:Macromolecular Substances; D009698:Nucleoproteins; D012329:RNA, Bacterial; D012335:RNA, Ribosomal; D014316:Tritium; D010649:Phenylalanine; D014498:Uracil; D000535:Aluminum; D008274:Magnesium