What does DRAQ5 stain?
DRAQ5™ Fluorescent Probe is a far-red DNA stain for fluorescent cellular imaging applications with live or fixed cells. Because of its far-red excitation and emission, the DRAQ5 Stain can be multiplexed with many other fluorophores.
Is DRAQ5 Fixable?
General notes. DRAQ5™ is a cell permeable far-red fluorescent DNA dye that can be used in fixed or non-fixed/ live cells in combination with common labels such as GFP or FITC.
What is DAPI staining used for?
DAPI staining was used to determine the number of nuclei and to assess gross cell morphology. Following light microscopic analyses, the stained cells were processed for electron microscopy. Cells stained with DAPI showed no ultrastructural changes compared to the appearance of cells not stained with DAPI.
What are two nuclear stains or indicators?
Examples of cell-impermeant nuclear stains include DAPI, propidium iodide, TO-PRO®-3, and SYTOX® stains.
How do I use DRAQ5?
Add DRAQ5™ directly as supplied to a final concentration of 5µM. This will be used as an overlay for adherent cells / tissue sections, added to the chamber / well liquid directly or in fresh media following a wash step. 6. Gently mix by pipetting and then incubate for 5 – 30 minutes at room temperature.
What does DRAQ5 bind?
At higher concentrations (3 and 7.5 microM), DRAQ5 interfered with binding of H2B core histones to DNA.
Why is DAPI important?
Dapi is a nuclear stain as we all know. And it is used as a counter stain. After we localize a particular antigen on cell we counterstain with dapi to make sure that only the cell has taken the stain and not an artifect or other thing. So in the end we take a merge photo.
What does DAPI blue stain?
DAPI is a blue fluorescent DNA stain which is cell permeant at high concentrations. DAPI binds strongly to A-T rich regions in DNA to form a fluorescent complex. It preferentially stains ds-DNA and has a high quantum yield (φf=0.92) when bound to DNA. DAPI is commonly used as a nuclear and chromosome counterstain.
Which stain is used for nuclear staining?
hematoxylin
Nuclear stains are used for the staining of the nuclei and they work by reacting with negatively charged components such as nucleic acids in the nucleus. A frequently used nuclear stain, hematoxylin, comes from a logwood tree, scientifically known as the Haematoxylum campechianum.
Which of the following is a nuclear stain?
Acetocarmine is a saturated solution of carmine in 45% acetic acid used especially for the rapid staining of fresh unfixed chromosomes. It is used to study the stages of cell division.
Why does DAPI bind to DNA?
Although not as bright as the vital Hoechst stains for DNA, DAPI has greater photostability. It is believed that DAPI associates with the minor groove of double-stranded DNA, with a preference for the adenine-thymine clusters. Cells must be permeabilized and/or fixed for DAPI to enter the cell and to bind DNA.
Is DAPI hydrophobic?
Indeed, as DAPI is hydrophobic it confers this behaviour on the DNA and thus restricts the presence of water molecules.
Why is the DRAQ5 stain used for nuclei?
Because of its far-red excitation and emission, the DRAQ5 Stain can be multiplexed with many other fluorophores. It is commonly chosen to counterstain nuclei and measure DNA content in cell proliferation studies involving cells expressing green fluorescent protein (GFP) fusion proteins.
What is the function of DRAQ5 dye?
DRAQ5™ is a cell-permeant DNA binding anthraquinone dye that intercalates between A-T bases of dsDNA. Due to its cell permeability, this dye is useful for assessing DNA content and cell cycle but is not suitable to be used as a viability dye.
What is the function of DRAQ5 nuclear probe?
Therefore, nuclear probes that emit in a color other than blue are useful for cell identification and counting, and for determining nuclear morphology and DNA content. DRAQ5 Fluorescent Probe emits in the far-red region, is lipophilic and crosses cell and nuclear membranes in live and fixed cells and tissues for rapid DNA staining.
What is the excitation wavelength of DRAQ5™?
DRAQ5™ is cell permeable and may be used to stain nucleic acids in live or fixed cells for cell cycle analysis by DNA content, nuclear visualization, or discrimination of nucleated cells from debris or enucleated cells. DRAQ5™ has an excitation wavelength maxima of 598/646 nm, but can also be sub-optimally excited by the 488 nm laser.