Schäfer, R A micro-procedure for the preparation of highly purified 14 C-, 35 S-, and 32 P-labeled transcriptases from E. coli. [electronic resource] - Hoppe-Seyler's Zeitschrift fur physiologische Chemie Oct 1971 - 1398-400 p. digital Publication Type: Journal Article ISSN: 0018-4888 Standard No.: 10.1515/bchm2.1971.352.2.1398 doi Subjects--Topical Terms: Carbon IsotopesCulture MediaEnzyme PrecursorsEscherichia coli--enzymologyMethodsPhosphorus IsotopesRNA Nucleotidyltransferases--isolation & purificationSulfur Isotopes