title: Increase in activity of ribonucleic acid polymerase of rat-liver nuclei during lactation.
mesh_terms: D000818:Animals; D002467:Cell Nucleus / Q000201:enzymology; D005260:Female; D007774:Lactation; D008099:Liver / Q000201:enzymology*; D011247:Pregnancy; D012316:RNA Nucleotidyltransferases / Q000032:analysis*; D051381:Rats
chemical_list: D012316:RNA Nucleotidyltransferases