title: On the heterogeneity of eukaryotic ribosomal subunits in vitro.
mesh_terms: D000818:Animals; D002499:Centrifugation, Density Gradient; D066298:In Vitro Techniques; D008099:Liver / Q000648:ultrastructure*; D008970:Molecular Weight; D012335:RNA, Ribosomal / Q000032:analysis; D051381:Rats; D012270:Ribosomes / Q000032:analysis / Q000648:ultrastructure*
chemical_list: D012335:RNA, Ribosomal