title: A 44-S particle derived from the 50-S ribosomal subunit of Escherichia coli and its polymerization.
mesh_terms: D001426:Bacterial Proteins / Q000378:metabolism; D002499:Centrifugation, Density Gradient; D004586:Electrophoresis; D004926:Escherichia coli / Q000166:cytology* / Q000187:drug effects / Q000378:metabolism; D046911:Macromolecular Substances; D008274:Magnesium / Q000494:pharmacology; D008854:Microscopy, Electron; D008970:Molecular Weight; D012329:RNA, Bacterial / Q000378:metabolism; D012335:RNA, Ribosomal / Q000378:metabolism; D012270:Ribosomes / Q000187:drug effects / Q000378:metabolism*; D014508:Urea
chemical_list: D001426:Bacterial Proteins; D046911:Macromolecular Substances; D012329:RNA, Bacterial; D012335:RNA, Ribosomal; D014508:Urea; D008274:Magnesium