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S. cerevisiae septins revealed with fluorescent microscopy utilizing fluorescent labeling. In molecular biology and biotechnology, a fluorescent tag, also known as a fluorescent label or fluorescent probe, is a molecule that is attached chemically to aid in the detection of a biomolecule such as a protein, antibody, or amino acid.
In these embryos the concentration of Bicoid protein could be accurately measured either by the intensity of the autofluorescence of the GFP protein itself (not shown) or by the intensity of fluorescence of an anti-GFP antibody tagged with a fluorescent dye, as shown in a surface view of the embryo here.
SNAP-tag reaction scheme. SNAP-tag® is a self-labeling protein tag commercially available in various expression vectors. SNAP-tag is a 182 residue polypeptide (19.4 kDa) that can be fused to any protein of interest and further specifically and covalently tagged with a suitable ligand, such as a fluorescent dye.
Cyanine dyes are used to label proteins, antibodies, peptides, nucleic acid probes, and any kind of other biomolecules to be used in a variety of fluorescence detection techniques: flow cytometry, microscopy (mainly the visible range, but also UV and IR), microplate assays, microarrays, as well as "light-up probes," and in vivo imaging.
LifeAct peptides have been used as a universal marker for F-actin visualization in biomedical research. An experiment conducted by Sawant et al. utilized LifeAct GFP to visualize the migration of control border cells in the ovaries of Drosophila flies, in order to determine how cells move in terms of small and large collectives during development and cancer. [6]
A simplified Jablonski diagram illustrating the change of energy levels.. The principle behind fluorescence is that the fluorescent moiety contains electrons which can absorb a photon and briefly enter an excited state before either dispersing the energy non-radiatively or emitting it as a photon, but with a lower energy, i.e., at a longer wavelength (wavelength and energy are inversely ...
Fluorescence imaging photographs fluorescent dyes and fluorescent proteins to mark molecular mechanisms and structures. It allows one to experimentally observe the dynamics of gene expression, protein expression, and molecular interactions in a living cell. [3] It essentially serves as a precise, quantitative tool regarding biochemical ...
Some impermeable fluorescent zinc dyes can detectably label the cytosol and nuclei of apoptizing and necrotizing cells among each of four different tissue types examined. . Namely: the cerebral cortex, the hippocampus, the cerebellum, and it was also demonstrated that colocalized detection of zinc increase and the well accepted cell death indicator propidium iodide also occurred in kidney
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