Cereal Chem 62:231-238   |  VIEW ARTICLE
The Interactions of Minerals, Proteins, and Phytic Acid in Rice Bran.

E. T. Champagne, R. M. Rao, J. A. Liuzzo, J. W. Robinson, R. J. Gale, and F. Miller. Copyright 1985 by the American Association of Cereal Chemists, Inc. 

The influences of the chemical environment on the mineral, protein, and phytic acid relationships in rice bran were examined. Adding increasing amounts of Fe(II), Fe(III), Zn(II), or Cu(II) ions as the sulfates to rice bran slurries affected the solubilities of the endogenous minerals, proteins, and phytates. The data from these solubility studies along with the results of sodium dodecyl sulfate gel electrophoresis, pH, and differential pulse polarography experiments provided evidence for: association of iron, zinc, and copper ions with the albumins leading to the formation of insoluable mineral-albumin complexes; and the presence of potassium, magnesium, and calcium phytates, the solubilities of which were affected by pH and not by the addition of Fe(II), Fe(III), Zn(II), or Cu(II) ions.