title: Intermediate stage in the association and dissociation of Escherichia coli ribosomes and the combining properties of their subunits.
mesh_terms: D002499:Centrifugation, Density Gradient; D004926:Escherichia coli; D066298:In Vitro Techniques; D008274:Magnesium / Q000494:pharmacology; D010759:Phosphorus Isotopes; D012270:Ribosomes / Q000187:drug effects / Q000378:metabolism*
chemical_list: D010759:Phosphorus Isotopes; D008274:Magnesium