6.3.1.2 | recombinant His-tagged nearly pure glutamine synthetase from inclusion bodies is solubilised at 37°C using 8 M urea as chaotrope in 20 mM Tris-HCl, pH 8.0, containing 2 mM EDTA and 50 mM DTT. The solubilised protein is then diluted in 20 mM Tris-HCl, pH 7.5, with 2 M NaCl and 5 mM DTT to a final protein concentration of 0.02 mg/ml and kept overnight at room temperature to enable proper folding |
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