Bunow B, Caplan S R
Biophys J. 1984 Jun;45(6):1065-71. doi: 10.1016/S0006-3495(84)84253-8.
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.
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。