A method of purifying human growth hormone (hGH) from deamidated hGH, oxidized hGH or both. The method comprises the steps of forming a metal cation complexed-hGH composition enriched in native hGH under conditions wherein none or less than all of the deamidated hGH, oxidized hGH or both complex with...http://www.google.fr/patents/US6451347?utm_source=gb-gplus-shareBrevet US6451347 - Method for purifying human growth hormone
