title: Two forms of the 30 S ribosomal subunit of Escherichia coli.
mesh_terms: D002458:Cell Fractionation; D002499:Centrifugation, Density Gradient; D003090:Coliphages; D004267:DNA Viruses; D004591:Electrophoresis, Polyacrylamide Gel; D004926:Escherichia coli / Q000378:metabolism / Q000648:ultrastructure*; D011132:Polyribosomes / Q000378:metabolism / Q000648:ultrastructure; D011134:Polysaccharides; D012333:RNA, Messenger / Q000378:metabolism; D012367:RNA, Viral / Q000378:metabolism; D012270:Ribosomes / Q000378:metabolism / Q000648:ultrastructure*
chemical_list: D011134:Polysaccharides; D012333:RNA, Messenger; D012367:RNA, Viral