Characteristics of Lysozymes from Different Egg-White

Two different methods of extracting lysozyme from egg white have been compared. Crystallization was better than chromatography, since the former was much easier and need less time. Further more, the crystallization method could get more lysozyme not only by quantity but also by activity. However, both methods could not purify lysozyme from duck egg-white. The activity of lysozyme from different egg-white was almost the same when they at the same temperature, which indicated their close relationship. However, under different pH, there were some differences between them, especially the lysozyme from duck egg-white which was more stable in acidic condition.