Dual-channel Fluorescence
Dual-channel Fluorescence - Related Videos
11:21
Photoconversion of Purified Fluorescent Proteins and Dual-probe Optical Highlighting in Live Cells
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Cited by 5 •
2010
This protocol describes a general approach to perform photoconversion of fluorescent proteins on a confocal laser scanning microscope. We describe procedures for the photoconversion of puried protein samples, as well as for dual-probe optical highlighting in live cells with mOrange2 and Dronpa.
10:30
Simultaneously Capturing Real-time Images in Two Emission Channels Using a Dual Camera Emission Splitting System: Applications to Cell Adhesion
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Cited by 3 •
2013
Dual camera emission splitting systems for two-color fluorescence microscopy generate real-time image sequences with exceptional optical and temporal resolution, a requirement of certain live cell assays including parallel plate flow chamber adhesion assays. When software is employed to merge images from simultaneously acquired emission channels, pseudocolored image sequences are produced.
03:16
Dual Fluorescence Imaging to Identify Differentiated Oligodendrocytes
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2025
Source: Schott, J. T., et al. Preparation of Rat Oligodendrocyte Progenitor Cultures and Quantification of Oligodendrogenesis Using Dual-infrared Fluorescence Scanning. J. Vis. Exp. (2016). This video demonstrates the use of dual fluorescence imaging to evaluate the differentiation of oligodendrocytes from precursor cells (OPCs) isolated from a rat pup brain. The process includes fixing the cells, labeling specific markers with primary and fluorophore-conjugated secondary antibodies, and...
05:31
A Fluorescent Screening Assay for Identifying Modulators of GIRK Channels
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Cited by 7 •
2012
A real-time screening procedure for identifying drugs that interact with G protein-gated inward rectifier K+ (GIRK) channels is described. The assay utilizes membrane potential-sensitive fluorescent dyes to measure GIRK channel activity. This technique is adaptable for use on a number of cell lines.
14:44
Scalable Fabrication of Stretchable, Dual Channel, Microfluidic Organ Chips
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Cited by 43 •
2018
Here, we present a protocol that describes the fabrication of stretchable, dual channel, organ chip microfluidic cell culture devices for recapitulating organ-level functionality in vitro.
FAQs
Signal separation depends on choosing fluorophores with sufficiently different excitation and emission spectra. Optical filters or independent detector channels then isolate each emitted signal, but spectral overlap can still cause one label to appear in the other channel. Managing this overlap is essential for accurate comparison of molecules, structures, or cellular states.
Bleed-through occurs when fluorescence from one label is detected in the channel assigned to the other label, usually because their spectral signals overlap. This can create an apparent association that does not reflect biology. Spectral compensation and carefully selected optical separation help reduce that misleading contribution before researchers interpret channel relationships.
A reference channel provides a comparison signal against which the second channel can be evaluated. This design helps researchers assess relative patterns, identify changes, and interpret whether signals occur in corresponding locations or states. The comparison remains meaningful only when labeling, exposure, background fluorescence, and spectral overlap are controlled consistently across the sample.
Labeling quality, exposure, background fluorescence, and spectral compensation all influence measurement reliability. Inadequate labeling can weaken a signal, while excessive exposure or background can obscure differences between channels. Researchers must therefore balance signal detection with optical separation and compensation so that observed contrasts represent biological variation rather than imaging artifacts.
A basic workflow begins by assigning compatible fluorescent labels to the biological targets, then acquiring each signal through its designated filter or detector channel. The resulting channels are compared after accounting for background and spectral overlap. Consistent exposure and appropriate compensation support clearer interpretation of localization patterns and relative signal changes.
The approach is useful when researchers need to compare two biological signals within the same sample. Applications described for biology include colocalization analysis, live-cell imaging, protein localization, and measurements using one channel as a reference. These applications can reveal whether distinct molecules or structures show corresponding spatial or cellular patterns.