title: The initiation of protein synthesis: joining of the 50S ribosomal subunit to the initiation complex.
mesh_terms: D001426:Bacterial Proteins / Q000096:biosynthesis*; D002247:Carbon Isotopes; D002501:Centrifugation, Zonal; D003090:Coliphages; D004926:Escherichia coli / Q000166:cytology / Q000378:metabolism*; D008274:Magnesium / Q000494:pharmacology; D008715:Methionine / Q000378:metabolism; D012329:RNA, Bacterial / Q000378:metabolism*; D012343:RNA, Transfer / Q000378:metabolism*; D012367:RNA, Viral / Q000494:pharmacology; D012270:Ribosomes / Q000378:metabolism*; D014316:Tritium
chemical_list: D001426:Bacterial Proteins; D002247:Carbon Isotopes; D012329:RNA, Bacterial; D012367:RNA, Viral; D014316:Tritium; D012343:RNA, Transfer; D008715:Methionine; D008274:Magnesium