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测定催化剂活性在含有固定化酶的渗透膜上的分布。结构问题功能方法的不确定性。

Determination of the distribution of catalyst activity across a permeable membrane containing an immobilized enzyme. Indeterminacy of a functional approach to a structural problem.

作者信息

Bunow B, Caplan S R

出版信息

Biophys J. 1984 Jun;45(6):1065-71. doi: 10.1016/S0006-3495(84)84253-8.

Abstract

Porous membranes were fabricated from collodion and impregnated with papain, inhomogeneously through the thickness of the membrane. These membranes were placed between reservoirs containing N-alpha-benzoyl arginineamide, a substrate for the enzyme papain. The progress of the reaction was monitored by sampling the reservoirs on each side for ammonia, a reaction product. From these data the diffusion coefficient, enzyme activity, and distribution of enzyme activity of the membrane were estimated. The limitations of this approach are discussed in the context of the analysis of biological transport systems.

摘要

用火棉胶制备多孔膜,并使其在膜的整个厚度上不均匀地浸渍木瓜蛋白酶。将这些膜置于含有N-α-苯甲酰精氨酸酰胺(木瓜蛋白酶的一种底物)的储液器之间。通过对两侧储液器中的反应产物氨进行采样来监测反应进程。根据这些数据估算膜的扩散系数、酶活性以及酶活性分布。在生物转运系统分析的背景下讨论了该方法的局限性。

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本文引用的文献

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Cellular enzymology: the steady-state kinetics of compartmentalized enzymes.
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Structural dynamics of yeast hexokinase during catalysis.酵母己糖激酶催化过程中的结构动力学
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Chemical reactions and membranes; a macroscopic basis for active transport. II. Non-linear aspects.
J Theor Biol. 1978 Nov 7;75(1):79-96. doi: 10.1016/0022-5193(78)90203-5.
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Kinetic evaluation of the Na-K pump reaction mechanism.钠钾泵反应机制的动力学评估。
J Physiol. 1977 Dec;273(2):489-514. doi: 10.1113/jphysiol.1977.sp012106.
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Covalent labeling of membranes.膜的共价标记
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