PROCESS FOR PREPARING PURIFIED DIMER OF BONE-DERIVED FACTOR

摘要

A process for preparing a purified dimer of a bone-derived factor, which comprises subjecting an inclusion body of a bone-derived factor produced by genetic engineering to the following steps a) to e) in sequence: a) the step of treating an inclusion body of a bone-derived factor with an unfolding agent to prepare a solubilized monomer; b) the step of treating the solubilized monomer with a refolding solution to prepare a dimer; c) the step of subjecting the refolded dimer to ultrafiltration and solvent replacement; d) the step of subjecting the dimer solution prepared above to isoelectric precipitation; and e) the step of subjecting the isoelectrically precipitated dimer to reversed phase chromatography.