Abstract
Expressing the extracellular domain of corticotropin releasing factor receptor 1 in Escherichia coli usually results in the formation of inclusion bodies. Here we describe the optimization of refolding by applying size exclusion chromatography with a denaturing guanidine hydrochloride gradient and a refolding buffer containing glycerol. Several chromatographic parameters like gradient length, flow rate, sample concentration and chromatography resin characteristics were evaluated. Recovery yields of refolded protein above 50% using a Superdex 200 column demonstrate the usefulness of this method.
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