SULFITOLYSIS OF DISULFIDE BONDS IN PROTEINS USING A SOLID-STATE COPPER CARBONATE CATALYST

被引:9
作者
GONZALEZ, JM [1 ]
DAMODARAN, S [1 ]
机构
[1] UNIV WISCONSIN,DEPT FOOD SCI,MADISON,WI 53706
关键词
D O I
10.1021/jf00091a032
中图分类号
S [农业科学];
学科分类号
09 ;
摘要
A novel method involving copper carbonate impregnated on silica beads as a solid-state catalyst to S-sulfonate the cysteine and cystine residues in proteins is described. The rate constant of the sulfonation reaction in the presence of the solid-state catalyst was severalfold higher than that of the reaction catalyzed by copper in the solution state. The activation energy of the reaction was about 8. 5 kcal/mol, which was about 2-fold smaller than that for the solution-phase catalysis. The advantages of this method over that of the other chemical modification methods to improve the functional properties of food proteins are discussed. © 1990, American Chemical Society. All rights reserved.
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页码:149 / 153
页数:5
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