Dual Color Labeling
Dual Color Labeling - Related Videos
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Visualization of the Immunological Synapse by Dual Color Time-gated Stimulated Emission Depletion (STED) Nanoscopy
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Cited by 12 •
2014
Here we illustrate the protocol for imaging by two-color STED nanoscopy the cytotoxic immune synapse of NK cells recapitulated on glass. Using this method we obtain sub-100 nm resolution of synapse proteins and the cytoskeleton.
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Colors and Magnetism
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2020
Color in Coordination Complexes When atoms or molecules absorb light at the proper frequency, their electrons are excited to higher-energy orbitals. For many main group atoms and molecules, the absorbed photons are in the ultraviolet range of the electromagnetic spectrum, which cannot be detected by the human eye. For coordination compounds, the energy difference between the d orbitals often allows photons in the visible range to be absorbed and emitted, which is seen as colors by the human eye.
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Dual-color Correlative Light and Electron Microscopy for the Visualization of Interactions between Mitochondria and Lysosomes
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Cited by 4 •
2024
This protocol describes a mechanism for using correlative light and electron microscopy to visualize the interaction of mitochondria and lysosomes labeled with mEosEM and APEX2, respectively.
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Visualizing Lignification Dynamics in Plants with Click Chemistry: Dual Labeling is BLISS!
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Cited by 8 •
2018
BLISS, a dual labeling protocol for studying lignification dynamics, was developed. Using synthetic monolignol reporters and a sequential combination of SPAAC and CuAAC bioorthogonal click reactions, this methodology paves the way to in-depth analysis of the factors that regulate the biogenesis of lignins in planta.
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Color Afterimages
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2023
Source: Laboratory of Jonathan Flombaum—Johns Hopkins University Human color vision is impressive. People with normal color vision can tell apart millions of individual hues. Most amazingly, this ability is achieved with fairly simple hardware. Part of the power of human color vision comes from a clever bit of engineering in the human brain. There, color perception relies on what is known as an 'opponent system.' This means that the presence of one kind of stimulus is treated as evidence for...
FAQs
Different fluorophores produce signals with distinct excitation or emission spectra. Imaging systems use suitable optical filters or separate channels to isolate those signals, allowing each target to be visualized independently. This spectral separation is essential because it preserves information about both markers while permitting their distributions to be compared within the same cellular or tissue context.
Marker selectivity determines which cellular structure, molecule, or population receives each fluorescent signal. Antibodies, nucleic-acid probes, and other markers can be chosen to recognize different targets, connecting each color to a specific biological identity. Reliable selectivity makes comparisons meaningful because observed signal locations can be interpreted in relation to the intended targets.
A second fluorescent marker adds a direct comparison within the same specimen. Investigators can examine whether two targets occupy similar or different locations, compare their organization or expression, and relate molecular identity to spatial context. This reduces ambiguity that can occur when a single marker is viewed without a matched reference target.
A typical workflow selects two target-specific markers, attaches distinguishable fluorophores to them, applies the markers to the same specimen, and records each signal through an appropriate imaging channel. Optical filters or channel separation then distinguish the colors. The resulting images can be examined together to compare target distributions and spatial relationships.
Overlapping signal locations can indicate that two labeled targets share a spatial region, while separated signals show distinct distributions. The comparison supports co-localization analysis, in which researchers evaluate the spatial relationship between targets rather than viewing either marker alone. Interpretation remains tied to the selectivity of the markers and the clarity of channel separation.
This approach can connect molecular identity with location in studies of cell structure, signaling, development, and disease. It also supports cell tracking and comparisons of expression or organization between targets. By showing two signals in a shared specimen, the method helps researchers examine how cellular components or populations are arranged and related.