钙离子对铜离子与植酸相互作用的影响。

Effects of Ca(II) ions on Cu(II) ion-phytic acid interactions.

作者信息

Champagne E T

机构信息

Southern Regional Research Center, U.S. Department of Agriculture, New Orleans, LA 70179.

出版信息

J Inorg Biochem. 1987 Sep;31(1):29-42. doi: 10.1016/0162-0134(87)85003-1.

DOI:10.1016/0162-0134(87)85003-1

PMID:3694196

Abstract

In vitro interactions among phytic acid (PA), Cu(II) ions, and Ca(II) ions were examined as functions of PA:Cu(II):Ca(II) molar ratios and pH. Ca(II) ions competed with Cu(II) ions for binding by the soluble phytate species for PA:Cu(II) molar ratios ranging from 10:1 to 1:6 and pH values in the 2.4-5.9 range. At pH values where precipitation occurred, Ca(II) ions potentiated Cu(II) ion binding by the precipitated phytate species for PA:Cu(II) molar ratios of 10:1 to 1:3. At lower PA:Cu(II) molar ratios, Ca(II) ions competed with Cu(II) ions for binding by the precipitated phytate species. Compositions of the precipitated copper-calcium phytates are reported.

摘要

研究了植酸（PA）、铜（II）离子和钙（II）离子之间的体外相互作用，考察了其作为PA:Cu（II）:Ca（II）摩尔比和pH值的函数关系。对于PA:Cu（II）摩尔比为10:1至1:6且pH值在2.4 - 5.9范围内，钙（II）离子与铜（II）离子竞争与可溶性肌醇六磷酸物种的结合。在发生沉淀的pH值下，对于PA:Cu（II）摩尔比为10:1至1:3，钙（II）离子增强了沉淀的肌醇六磷酸物种对铜（II）离子的结合。在较低的PA:Cu（II）摩尔比下，钙（II）离子与铜（II）离子竞争与沉淀的肌醇六磷酸物种的结合。报告了沉淀的铜 - 钙肌醇六磷酸盐的组成。