Glutamine Synthetase in Preparations of RNA Polymerase of Escherichia coli:A Novel Purification Procedure
1982
A novel procedure of operational ease and reproducibility for the partial purification of DNA-dependent RNA polymerase [EC 2.7.7.6] from Escherichia coli is reported. It utilizes liquid phase partitions with polyethylene glycol and Dextran, ammonium sulfate fractionations and chromatography on a QAE-Sephadex A-50 column. A copurified protein in the partially purified preparation was isolated and identifed as glutamine synthetase [L-glutamate : ammonia ligase (ADP) EC 6.3.1.2].
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