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相关概念视频

Enzyme-Linked Immunosorbent Assay01:33

Enzyme-Linked Immunosorbent Assay

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In 1971, Peter Perlman and Eva Engvall developed an Enzyme-linked immunosorbent assay (ELISA or EIA). ELISA differs from western blot in that the assays are conducted in microtiter plates or in vivo rather than on an absorbent membrane.
There are many different types of ELISAs, but they all involve an antibody molecule whose constant region binds an enzyme, leaving the variable region free to bind its specific antigen.  Enzyme-substrate reaction allows the antigen to be visualized or...
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The Importance of Correct Protein Concentration for Kinetics and Affinity Determination in Structure-function Analysis
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在蛋白质活动中克服批量到批量变化,使用以皮托普为特异的校准无度分析.

Ian B Harvey1, Shannon D Chilewski1, Devyani Bhosale1

  • 1Translational Sciences and Diagnostics, Bristol-Myers Squibb, Princeton, New Jersey 08540, United States.

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传统的蛋白质度方法可能会误导活性蛋白质水平,导致测试变化. 一种新的无校准度分析 (CFCA) 方法量化了活性蛋白度,显著提高了测试一致性,减少了批量之间的变化.

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科学领域:

  • 生物化学 生化学
  • 蛋白质的表征 蛋白质的表征
  • 测试开发的发展.

背景情况:

  • 准确的蛋白质度测定对于测定可重复性至关重要.
  • 尽管传统的度测量,蛋白质试剂的批量变化仍然存在.
  • 不活性蛋白种可以导致不准确的总蛋白质度值.

研究的目的:

  • 开发一种标准化方法来量化活性蛋白度.
  • 为了解决蛋白质试剂的批量变异性.
  • 引入无校准度分析 (CFCA) 作为一种溶液.

主要方法:

  • 开发了一种标准化的无校准度分析 (CFCA) 方法.
  • 对于复合溶性淋巴细胞激活基因3 (sLAG3) 批次的量化活性蛋白度.
  • 使用总度和活性蛋白度比较生物物理和免疫测试反应.

主要成果:

  • 通过测定特定度来定义sLAG3试剂,提高了动力结合参数的一致性.
  • 与总蛋白质度相比,活性度测量降低了免疫测试批对批变化系数 (CVs) 的600%以上.
  • CFCA在测定结果中表现出更好的一致性.

结论:

  • 总蛋白质度可能不是理想的指标,用于对比测试中的信号.
  • 通过CFCA量化测试特异性表位,可以克服分批对分批的变化.
  • CFCA是准确的蛋白质试剂表征的一个有价值的工具.