- Solution stirring initiates nucleation and improves the quality of adenosine deaminase crystals. Adachi, H., Takano, K., Niino, A., Matsumura, H., Kinoshita, T., Warizaya, M., Inoue, T., Mori, Y., Sasaki, T. Acta Crystallogr. D Biol. Crystallogr. (2005)