Fluorescently Labeled Nucleotides
Fluorescently Labeled Nucleotides - Related Videos
07:25
Use of Stopped-Flow Fluorescence and Labeled Nucleotides to Analyze the ATP Turnover Cycle of Kinesins
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Cited by 10 •
2014
Kinesins are characterized by nucleotide-dependent interaction with microtubules: a cycle of ATP turnover coupled to a cycle of microtubule interaction. Here, we describe protocols to analyze the kinetics of individual nucleotide transitions in the ATP turnover cycle of a kinesin using fluorescently labeled nucleotides and stopped-flow fluorescence.
11:12
Fluorescent Labeling of Drosophila Heart Structures
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Cited by 63 •
2009
Here we describe a basic protocol for fluorescent labeling of different elements of heart tubes from larva and adult Drosophila melanogaster. These specimens are well-suited for imaging via fluorescent or confocal microscopy. This technique permits detailed structural analysis of the features of the hearts from a powerful model organism.
04:35
Isolating Fluorescently Labeled Neurons from a Murine Brain
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2025
This video demonstrates a method to isolate fluorescently labeled neurons from a mouse brain.
04:46
Immunostaining of Fluorescently Labeled Astrocytes in a Mouse Brain Tissue Section
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2025
This video demonstrates the procedure for immunostaining a fixed mouse brain tissue section with fluorescently labeled astrocytes using primary and secondary antibodies and capture the images of the stained astrocytes through confocal microscopy.
03:15
Sample Preparation and Imaging of Fluorescently Labeled Bacteria
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2026
Source: Chetrit, D., et al. Applying Live Cell Imaging and Cryo-Electron Tomography to Resolve Spatiotemporal Features of the Legionella pneumophila Dot/Icm Secretion System. J. Vis. Exp. (2020).This video demonstrates the preparation and imaging of fluorescently labeled pathogenic bacteria. Agarose pads are first prepared and positioned within an adhesive frame. A suspension of genetically modified bacteria expressing a fluorescent protein is applied to the pad to immobilize the cells. The...
FAQs
The fluorophore absorbs light at an appropriate wavelength and then emits light that can be detected optically. Because the label is covalently attached to the nucleotide, fluorescence provides a signal associated with that nucleotide rather than an unconnected indicator. This relationship allows chemical or molecular events involving the nucleotide to be monitored through changes in detectable fluorescence.
Covalent attachment links the optical reporter directly to the nucleotide’s chemical structure. The nucleotide can therefore participate in nucleic acid synthesis or hybridization while the fluorophore supplies a detectable signal. This combination connects molecular participation with observation, helping researchers follow nucleic acid reactions and interactions without treating the fluorescent signal as a separate component.
The distinction comes from the molecular process being monitored. During synthesis, the labeled nucleotide can become associated with a newly produced nucleic acid, whereas during hybridization, its signal can indicate interactions between complementary nucleic acid molecules. Fluorescence serves as the common readout, while the experimental design determines whether synthesis or molecular binding is being examined.
Fluorescence adds an optical way to follow molecular interactions that would otherwise require indirect chemical observation. When labeled nucleotides participate in nucleic acid-related processes, the resulting signal can support analysis of molecular structure, reaction mechanisms, or interaction patterns. In chemistry, this makes the labels useful for connecting nucleic acid behavior with measurable analytical signals.
They provide a fluorescent signal that can reveal the presence or behavior of DNA or RNA in an analytical workflow. Because the nucleotide component can participate in nucleic acid synthesis or hybridization, the signal can be associated with specific molecular events rather than simple sample presence alone. This supports detection strategies focused on nucleic acid identity, interaction, or formation.
In sequencing, fluorescently labeled nucleotides support optical monitoring of nucleotide-related events during analysis. In amplification assays, they provide a way to detect or follow nucleic acid production through fluorescence. These applications use the same chemical feature, a nucleotide linked to an emitting fluorophore, but apply it to different analytical goals involving sequence information or increased nucleic acid signal.
Researchers can use the fluorescent signal to visualize interactions involving DNA or RNA, including events associated with nucleic acid hybridization. The label makes otherwise molecular-scale behavior accessible through optical observation. This is especially relevant when the goal is to examine how nucleic acids interact, investigate molecular structure, or connect an interaction with a broader analytical measurement.