Fluorescent Dna
Fluorescent Dna - Related Videos
05:37
Single-Molecule Fluorescence Visualization of DNA Polymerase Dynamics at G-Quadruplexes
0 Views •
2025
This protocol outlines a fluorescence microscopy-based single-molecule DNA replication assay, enabling real-time visualization of interactions between DNA polymerases and obstacles such as G-quadruplex structures.
08:51
Visualization of Surface-tethered Large DNA Molecules with a Fluorescent Protein DNA Binding Peptide
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Cited by 7 •
2016
We present an approach for visualizing fluorescent protein DNA binding peptide (FP-DBP)-stained large DNA molecules tethered on the polyethylene glycol (PEG) and avidin-coated glass surface and stretched with microfluidic shear flows.
15:57
Visualizing Single-molecule DNA Replication with Fluorescence Microscopy
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Cited by 9 •
2009
This protocol demonstrates a simple single-molecule fluorescence microscopy technique for visualizing DNA replication by individual replisomes in real time.
06:00
HCR-DNA FISH: A Fluorescence In Situ Hybridization Technique to Detect Viral DNA in Infected Cells
0 Views •
2023
In this video, the cells infected with MCPyV virions were subjected to in situ hybridization chain reaction to detect MCPyV specific genomes. Further, the DNA-HCR technique was combined with FISH to visualize the MCPyV DNA in infected human skin cells.
06:07
Continuous Fluorescence-Based Endonuclease-Coupled DNA Methylation Assay to Screen for DNA Methyltransferase Inhibitors
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2022
DNA methyltransferases are potential cancer drug targets. Here, a protocol is presented to assess small molecules for DNA methyltransferase inhibition. This assay utilizes an endonuclease to couple DNA methylation to fluorescence generation and allows for enzyme activity to be monitored in real...
FAQs
A fluorophore first absorbs excitation light and moves into an excited electronic state. As it returns toward a lower-energy state, it releases part of the absorbed energy as fluorescence at a longer wavelength. This change in wavelength makes the labeled DNA detectable through emitted light and connects a molecular event to an observable biochemical signal.
Specificity depends on how the fluorescent label is connected to the nucleic acid. A label attached to a nucleotide can identify the DNA molecule containing that nucleotide, while a fluorescent complementary probe links the signal to a matching sequence through hybridization. Thus, label placement determines whether detection follows a particular molecule or a defined genetic target.
Fluorescent signals can report whether complementary strands hybridize, whether nucleic acids bind, and whether amplification produces additional target material. Because the light output can be monitored, the same labeled system supports observation of molecular interactions as well as measurement-related assays. This makes fluorescence useful for connecting DNA behavior with biochemical changes.
A typical workflow connects a fluorescent label to DNA or to a complementary probe, exposes the labeled material to the sample, and allows sequence matching through hybridization. The system is then illuminated with excitation light, and emitted fluorescence is monitored. Detection of the signal indicates that the labeled molecule or its complementary genetic target is present.
In electrophoresis, fluorescence allows DNA separated through the system to be detected as labeled material, supporting observation of the resulting DNA pattern. In fluorescence microscopy, emitted light makes labeled DNA visible within the field of view, helping researchers examine its organization or track its location. These applications use the same signal for different spatial readouts.
Fluorescent DNA provides a measurable light signal that can be used in nucleic acid quantification and in assays designed to detect genetic targets. When fluorescence is associated with hybridization or amplification, the observed signal connects the measurement to a specific sequence or to amplification-related DNA production. This enables sensitive biochemical monitoring rather than visual inspection alone.