title: Effective formaldehyde fixation of the reversibly interacting ribosomal system.
mesh_terms: D002499:Centrifugation, Density Gradient; D003584:Cytological Techniques; D004926:Escherichia coli; D005557:Formaldehyde / Q000494:pharmacology*; D008274:Magnesium / Q000494:pharmacology*; D012270:Ribosomes / Q000187:drug effects*
chemical_list: D005557:Formaldehyde; D008274:Magnesium