[Effect of pH on circular dichroism and Raman spectroscopy of secondary structure of beta-casein from Chinese human milk].

To obtain a structural basis for the beta-casein in Chinese human milk, structural transitions of the beta-casein in response to variation of pH were investigated using Raman and circular dichroism (CD) spectroscopy. Both methods indicated that the secondary structures of beta-casein in the solution were induced by the pH. Secondary structural analysis of beta-casein by CD spectroscopy yielded 0.