title: Studies on the structure of animal ribosomes. II. Loosening and unlocking of rat liver ribosomes at low Mg ++  concentration: an electron microscopic study.
mesh_terms: D000818:Animals; D066298:In Vitro Techniques; D008099:Liver / Q000166:cytology*; D008274:Magnesium / Q000032:analysis; D008854:Microscopy, Electron; D051381:Rats; D012270:Ribosomes
chemical_list: D008274:Magnesium