title: Anomalies in polysome profiles caused by contamination of the gradients with Cu 2+  or Zn 2+ .
mesh_terms: D000818:Animals; D001647:Bile Acids and Salts / Q000494:pharmacology; D002247:Carbon Isotopes; D002499:Centrifugation, Density Gradient; D003300:Copper / Q000494:pharmacology*; D004492:Edetic Acid / Q000494:pharmacology; D066298:In Vitro Techniques; D008099:Liver / Q000166:cytology / Q000187:drug effects* / Q000378:metabolism; D046911:Macromolecular Substances; D008297:Male; D008722:Methods; D008862:Microsomes, Liver / Q000187:drug effects; D009963:Orotic Acid / Q000378:metabolism; D014176:Protein Biosynthesis; D051381:Rats; D012270:Ribosomes / Q000187:drug effects* / Q000378:metabolism; D013347:Subcellular Fractions / Q000187:drug effects / Q000378:metabolism; D014633:Valine / Q000378:metabolism; D015032:Zinc / Q000494:pharmacology*
chemical_list: D001647:Bile Acids and Salts; D002247:Carbon Isotopes; D046911:Macromolecular Substances; D009963:Orotic Acid; D003300:Copper; D004492:Edetic Acid; D014633:Valine; D015032:Zinc