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Microbial Biosensors01:17

Microbial Biosensors

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Microbial biosensors are analytical devices that utilize living microbes to detect specific substances through measurable signals. These devices consist of two main components: biosensing organisms and signal-transducing elements. Biosensing organisms, such as Escherichia coli or Saccharomyces cerevisiae, are typically housed in multiwell plates connected to transducers, enabling rapid, real-time detection of target analytes.Signal Generation MechanismWhen a target analyte—such as...
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相关实验视频

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FRET Microscopy for Real-time Monitoring of Signaling Events in Live Cells Using Unimolecular Biosensors
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强大的校准和量化FRET信号使用多重生物传感器条形码.

Jhen-Wei Wu1, Jr-Ming Yang1, Chao-Cheng Chen1

  • 1Department of Pathology, Department of Cell Biology, and Center for Cell Dynamics, Johns Hopkins University, Baltimore, MD 21205, USA.

iScience
|November 10, 2025
PubMed
概括

我们开发了一种使用光蛋白条形码的校准方法,以使弗斯特共振能量转移 (FRET) 生物传感器信号正常化. 这一策略确保了独立于成像条件的精确FRET效率测量,从而使得活细胞研究更为可靠.

关键词:
生物物理化学 生物物理化学生物技术是生物技术.生物科学中的方法论.传感器 传感器 传感器

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科学领域:

  • 活细胞成像成像技术
  • 生物物理学的生物物理.
  • 分子生物学分子生物学

背景情况:

  • 福斯特共振能量转移 (FRET) 对遗传编码的光生物传感器至关重要.
  • FRET比率对成像参数敏感,阻碍了准确的数据解释.
  • 对于可靠的FRET生物传感器测量,需要进行规范化.

研究的目的:

  • 为FRET生物传感器成像开发一个强大的校准策略.
  • 为了确保FRET比率独立于成像条件.
  • 为了使多重的FRET效率确定.

主要方法:

  • 使用基于光蛋白 (FP) 的条形码作为细胞内的校准标准.
  • 设计了"FRET-ON"和"FRET-OFF"标准,用于高和低FRET校准.
  • 集成的仅供体和仅接受体控制器,用于同时测量FRET效率.

主要成果:

  • 校准的FRET比率独立于像刺激强度这样的成像参数.
  • 校准策略恢复了互惠的捐赠器和接受器信号变化.
  • 能够同时确定多个生物传感器的FRET效率.

结论:

  • 引入了一种用于多重FRET生物传感器成像的简单而强大的策略.
  • 促进准确的交叉实验和长期FRET研究.
  • 提高FRET生物传感器数据的可靠性和可解释性.