title: A purification procedure for small amounts of radioactive Escherichia coli RNA polymerase.
mesh_terms: D002501:Centrifugation, Zonal; D002848:Chromatography, DEAE-Cellulose; D004279:DNA, Viral; D004586:Electrophoresis; D004926:Escherichia coli / Q000201:enzymology*; D008722:Methods; D011485:Protein Binding; D012316:RNA Nucleotidyltransferases / Q000302:isolation & purification*; D013460:Sulfur Isotopes; D014316:Tritium
chemical_list: D004279:DNA, Viral; D013460:Sulfur Isotopes; D014316:Tritium; D012316:RNA Nucleotidyltransferases