Intercalating Dye Visualization
Intercalating Dye Visualization - Related Videos
10:53
Visualizing the Live Drosophila Glial-neuromuscular Junction with Fluorescent Dyes
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Cited by 5 •
2009
We described structural features of the Glia-neuromuscular synapses in a novel Inside-out tissue preparation of live fly larvae using fluorescent dyes with confocal microscopy. We labeled live neuron terminals with fluorescent primary antibodies to HRP, and also visualized the perisynaptic space with fluorescent Dextrans.
09:49
Visualizing Hyporheic Flow Through Bedforms Using Dye Experiments and Simulation
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Cited by 4 •
2015
This manuscript describes how to create regular bedforms in a flume, visualize flow through the bedforms, and use computer simulations to simulate the hyporheic flow. The computer simulations compare well with the experimental observations. This coupled simulation and experiment is well-suited for both research and educational purposes.
02:09
Visualization of Bacterial Motility Using Redox Dye–Supplemented Semisolid Medium
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2025
Source: Chu, W., and Zhuang, X. Visualizing Bacterial Motility Based on a Color Reaction. J. Vis. Exp. (2022)This video demonstrates a redox dye-based semisolid agar assay for assessing bacterial motility by visually distinguishing motile and non-motile strains.
06:40
Visualization of Chondrocyte Intercalation and Directional Proliferation via Zebrabow Clonal Cell Analysis in the Embryonic Meckel’s Cartilage
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Cited by 10 •
2015
Cell organization of craniofacial bones has long been hypothesized but never directly visualized. Multi-spectral cell labeling and in vivo live imaging allows visualization of dynamic cell behavior in zebrafish lower jaw. Here, we detail the protocol to manipulate Zebrabow transgenic fish and directly observe cell intercalation and morphological changes of chondrocytes in the Meckel’s cartilage.
08:22
Visualization of Caenorhabditis elegans Cuticular Structures Using the Lipophilic Vital Dye DiI
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Cited by 30 •
2012
We present a method to visualize cuticle in live C. elegans using the red fluorescent lipophilic dye DiI (1,1'-dioctadecyl-3,3,3',3'-tetramethylindocarbocyanine perchlorate), which is commonly used in C. elegans to visualize environmentally exposed neurons. With this optimized protocol, alae and annular cuticular structures are stained by DiI and observed using compound microscopy.
FAQs
The signal changes because the dye inserts between adjacent stacked base pairs in DNA or RNA. This interaction typically increases the molecule’s fluorescence compared with the unbound state, creating a detectable contrast when the sample is illuminated. That contrast is what allows nucleic acid bands or amplified products to be distinguished in laboratory assays.
The approach targets nucleic acids by taking advantage of dye interactions with stacked base pairs, so it can support visualization of DNA or RNA. Its value is therefore broader than a DNA-only readout: researchers can apply the same general fluorescence-based principle when examining different nucleic acid materials in molecular biology experiments.
After gel electrophoresis separates nucleic acid material, illumination reveals the resulting bands. Their positions can be used to estimate fragment size, while their visible signal provides information about relative abundance. This makes the combined approach useful for assessing whether a molecular biology experiment produced nucleic acid products with the expected separation and detectable amount.
During fluorescence-based assays, the method provides a signal associated with nucleic acid products generated during DNA amplification. Monitoring that signal helps researchers follow whether amplified material is being detected and assess the outcome of the amplification experiment. The same principle supports observation after electrophoresis, where amplified products appear as illuminated bands.
A typical workflow places the nucleic acid material in a format suitable for detection, such as after gel electrophoresis or within a fluorescence-based assay. The intercalating dye interacts with the target, and the sample is then illuminated so increased fluorescence can be observed. Researchers use the resulting bands or signals to assess experimental results.
Safety depends on the reagent selected because some intercalating dyes can damage cells or create handling risks. Researchers should therefore choose an appropriate dye for the experiment and follow laboratory safety procedures during preparation, use, and disposal. These precautions are important even when the goal is simply to visualize bands or monitor amplified products.