纯化牛酪蛋白与碱土金属离子之间相互作用的研究。
Studies on the interactions between purified bovine caseins and alkaline-earth-metal ions.
作者信息
Dickson I R, Perkins D J
出版信息
Biochem J. 1971 Aug;124(1):235-40. doi: 10.1042/bj1240235.
Abstract
- Alkaline-earth-metal cations at low concentrations form soluble complexes with bovine caseins. The relative order of binding capacities is: Mg(2+)>Ca(2+)>Ba(2+)>Sr(2+). 2. The cations interact with both free ionized carboxyl groups of aspartic acid and glutamic acid and with monoester phosphate groups covalently bound to serine and threonine; at low concentrations of the cations interactions are predominantly with the phosphate groups. 3. The order of binding capacities for purified components of the casein complex is: alpha(s1)-casein>beta-casein>kappa-casein.
摘要
- 低浓度的碱土金属阳离子与牛乳酪蛋白形成可溶性复合物。结合能力的相对顺序为：Mg(2+)>Ca(2+)>Ba(2+)>Sr(2+)。2. 这些阳离子与天冬氨酸和谷氨酸的游离离子化羧基以及与丝氨酸和苏氨酸共价结合的单酯磷酸基团相互作用；在阳离子低浓度时，相互作用主要发生在磷酸基团上。3. 酪蛋白复合物纯化成分的结合能力顺序为：α(s1)-酪蛋白>β-酪蛋白>κ-酪蛋白。
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