Gfp Fluorescence Imaging
Gfp Fluorescence Imaging - Related Videos
07:55
Imaging the Intracellular Trafficking of APP with Photoactivatable GFP
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Cited by 6 •
2015
While the transport of cell surface proteins is relatively easily studied, visualizing the trafficking of intracellular proteins is much more difficult. Here, we use constructs incorporating photoactivatable GFP and demonstrate a method to accurately follow the amyloid precursor protein from the Golgi apparatus to down-stream compartments and follow its clearance.
10:58
Assessment of GFP Expression and Viability Using the Tali Image-Based Cytometer
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Cited by 14 •
2011
This protocol describes how to perform cell viability and fluorescence expression assays using the Tali Image-Based Cytometer.
07:25
Live Imaging of GFP-labeled Proteins in Drosophila Oocytes
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Cited by 5 •
2013
A protocol for live imaging of GFP-tagged proteins or autofluorescent structures in individual Drosophila oocytes is described.
06:19
In Vivo Imaging of Cx3cr1gfp/gfp Reporter Mice with Spectral-domain Optical Coherence Tomography and Scanning Laser Ophthalmoscopy
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Cited by 5 •
2017
This protocol describes how high-resolution imaging techniques such as spectral domain optical coherence tomography and scanning laser ophthalmoscopy can be utilized in small rodents, using an ophthalmic imaging platform system, to obtain information on retinal thickness and microglial cell distribution, respectively.
09:14
Imaging Calcium Responses in GFP-tagged Neurons of Hypothalamic Mouse Brain Slices
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Cited by 5 •
2012
In this protocol, we update recent progress in imaging Ca2+ signals of GFP-tagged neurons in brain tissue slices using a red fluorescent Ca2+ indicator dye.
FAQs
The chromophore within GFP determines how the marker converts illumination into a detectable signal. When blue or ultraviolet light supplies excitation energy, the chromophore absorbs it and emits green light. A fluorescence microscope detects that emitted signal, enabling researchers to locate and measure tagged protein. This optical sequence links molecular labeling to observable cellular patterns.
Excitation and emission describe two separate stages of signal production. Blue or ultraviolet light provides the incoming excitation energy, while GFP releases that energy as green emitted light. The fluorescence microscope detects the emitted color rather than simply recording the illumination source. This distinction allows the instrument to identify GFP-associated signals within biological specimens.
A GFP fusion links the fluorescent marker directly to a protein of interest, making the tagged protein’s location accessible for observation. In contrast, placing GFP under specific gene regulatory elements uses fluorescence to monitor gene expression. The first strategy emphasizes protein localization, whereas the second reports activity associated with regulatory control, giving researchers complementary views of cell biology.
A typical workflow begins by selecting whether GFP will be fused to a protein of interest or controlled by specific gene regulatory elements. The biological sample is then illuminated with blue or ultraviolet light, and a fluorescence microscope detects the resulting green signal. Researchers can subsequently locate the marker and measure fluorescence patterns in cells, tissues, or organisms.
The observed fluorescence can reveal where a tagged protein is located, indicate patterns of gene expression, or show changes in cellular dynamics over time. These outcomes depend on whether GFP is attached to a protein or linked to regulatory elements. Because the signal can be observed in living systems, researchers can follow biological activity without relying only on fixed observations.
GFP fluorescence imaging supports investigations of cell biology, development, signaling, and disease. It is especially useful when researchers need to observe biological activity repeatedly in living cells, tissues, or organisms. Its minimally invasive character and time-resolved observations help connect fluorescence patterns with changing cellular or developmental processes rather than isolated static measurements.