Gel Loading Dye
Gel Loading Dye - Related Videos
06:47
Retrograde Loading of Nerves, Tracts, and Spinal Roots with Fluorescent Dyes
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Cited by 5 •
2012
We describe a simple and low cost technique for introducing high concentration of fluorescent and calcium-sensitive dyes into neurons or any neuronal tract using a polyethylene suction pipette.
09:32
Direct Imaging of ER Calcium with Targeted-Esterase Induced Dye Loading (TED)
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Cited by 60 •
2013
Targeted-esterase induced dye loading (TED) supports the analysis of intracellular calcium store dynamics by fluorescence imaging. The method bases on targeting of a recombinant Carboxylesterase to the endoplasmic reticulum (ER), where it improves the local unmasking of synthetic low-affinity Ca2+ indicator dyes in the ER lumen.
02:43
Microelectrode-Mediated FM Dye Loading and Unloading in Drosophila Larvae Nerve Cells
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2025
In this video, Drosophila larvae nerve fibers are immersed in FM dye, which binds to cell membrane lipids. Suction microelectrode and electrical pulses stimulate the endocytosis process, incorporating the FM dye into newly formed endocytic vesicles. This method, which visualizes presynaptic stages of neurotransmission, is useful for studying synaptic function and neurotransmitter release.
09:22
DNA Gel Electrophoresis
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2023
DNA gel electrophoresis is a technique used for the detection and separation of DNA molecules. An electric field is applied to a gel matrix comprised of agarose, and within the gel, charge particles will migrate and separate based on size. The negatively charged phosphates of the DNA backbone cause DNA fragments to move toward the anode - a positively charged electrode. The video explains the mechanism by which DNA fragments are resolved on an agarose gel, and it provides a step-by-step...
17:05
Loading a Calcium Dye into Frog Nerve Endings Through the Nerve Stump: Calcium Transient Registration in the Frog Neuromuscular Junction
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Cited by 13 •
2017
Here, we describe a method for loading a calcium-sensitive dye through the frog nerve stump into the nerve endings. We also present a protocol for the recording and analysis of fast calcium transients in the peripheral nerve endings.
FAQs
The dense component gives the sample enough mass to move into and remain within the gel well instead of dispersing at the surface. Glycerol or sucrose serves this loading function before the electric field separates the sample. This improves transfer from the pipette into the gel and reduces the chance of losing material during setup.
Tracking dyes provide a visual progress reference because they migrate through the gel at predictable rates during electrophoresis. Their position helps indicate how far the run has advanced, but it should not be treated as a direct image of DNA, RNA, or protein. The dyes serve as markers for run monitoring rather than necessarily staining the biomolecules.
The same preparation strategy can support DNA, RNA, and protein samples because the key functions are physical rather than dependent on one biomolecule type. A dense ingredient assists entry into the wells, while colored dyes provide a progress cue during separation. The resulting gel can therefore be used to examine band patterns from different biological sample classes.
Tracking dyes indicate migration progress, not necessarily biomolecule position, because they are colored reference substances rather than guaranteed stains for the separated material. Their predictable movement helps monitor the electrophoresis run, while actual band interpretation depends on the biomolecule pattern visible in the gel. This distinction prevents the progress marker from being mistaken for the experimental result.
It is added before the sample is placed in the gel wells. This timing allows the dense component to act during loading and places the tracking dyes in the sample from the start of electrophoresis. After the sample enters the wells, dye movement can be followed as the separation proceeds, providing a visual indication of run progress.
By combining easier well loading with visible run tracking, the reagent supports more consistent handling of samples and observation of separated bands. In biology research and teaching, this is useful when comparing DNA, RNA, or protein patterns across samples. The dye does not replace analysis of the bands; it helps make the electrophoresis process easier to monitor.