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DNA probes are fragments of DNA labeled with a reporter tag to enable their detection or purification. The resulting labeled DNA probes can then hybridize to target nucleic acid sequences through complementary base-pairing, and may be used to recover or identify these regions.
Radioisotopes, fluorophores, or small molecule binding partners like biotin or digoxigenin, are the most widely used reporter tags for labeling DNA probes. These labels can be attached to the probe DNA molecule via...
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Simultaneous Multicolor Imaging of Biological Structures with Fluorescence Photoactivation Localization Microscopy
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Light-Deactivated Fluorescent Probes (FLASH-Off) for Multiplexed Imaging.

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Summary
This summary is machine-generated.

Researchers developed new photo-switchable fluorescent probes for cyclic imaging. These probes enable rapid, controllable fluorescence quenching without washing, improving disease biology studies.

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Area of Science:

  • Biomedical Imaging
  • Molecular Biology
  • Chemical Biology

Background:

  • Cyclic fluorescence imaging is crucial for understanding complex diseases.
  • Existing cyclic methods face limitations like long quenching times and extensive washing.

Purpose of the Study:

  • To develop novel fluorochromes for efficient and rapid fluorescence quenching in cyclic imaging.
  • To overcome limitations of current cyclic imaging techniques.

Main Methods:

  • Synthesis of new fluorochromes featuring a photo-immolating triazene linker.
  • Utilizing a single UV light pulse (405 nm) for probe inactivation.
  • Demonstrating fluorescence quenching via antibody conjugates and intramolecular spirocyclization.

Main Results:

  • The new fluorochromes are efficiently inactivated by a single light pulse.
  • Fluorescence is switched off rapidly without the need for washing or exogenous chemicals.
  • The probes exhibit fast, controllable, and biocompatible performance in live and fixed samples.

Conclusions:

  • Photo-switchable fluorochromes offer significant advantages for cyclic fluorescence imaging.
  • These probes enable precise spatiotemporal control over fluorescence emission.
  • The developed technology has broad applications in studying disease biology and evolution.