Dna Staining
Dna Staining - Related Videos
04:33
Extracellular DNA Staining: A Method to Identify Extracellular DNA in FFPE Tissue Sections
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2023
This video describes the technique of staining extracellular DNA in FFPE tissue sections. The stained extracellular DNA can be quantitated to determine the efficacy of any therapeutic treatment that leads to the death of cancer cells.
03:32
Ethanol Fixation and DAPI Staining: A Method to Visualize DNA in C. elegans
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2023
Here, we describe a technique used to visualize genomic DNA in fixed, intact nematodes. The video includes an example protocol to count chromatin in unfertilized C. elegans oocytes.
05:59
Application of the DNA-Specific Stain Methyl Green in the Fluorescent Labeling of Embryos
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Cited by 24 •
2015
A method for fluorescent staining of fixed biological material with the specific DNA label methyl green is described. Methyl green is used in a diluted aqueous solution and is very resistant to photobleaching. Its far-red emission allows for deep specimen imaging, making it particularly adequate for whole embryos.
10:31
In Situ Labeling of Mitochondrial DNA Replication in Drosophila Adult Ovaries by EdU Staining
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Cited by 16 •
2016
Drosophila oogenesis continues to be exceptionally useful in the study of mitochondrial proliferation and inheritance. This manuscript describes a detailed protocol used to label the replicating mitochondrial DNA (mtDNA) in Drosophila adult ovaries with 5-ethynyl-2´-deoxyuridine (EdU), which facilitates uncovering mechanisms associated with mitochondrial inheritance that were previously debatable.
04:09
Assessing DNA Damage Foci: To Identify Radiation-Induced DNA Damage Foci in Cancer Cell Line Using Immunofluorescence Staining
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2023
This video describes a protocol to detect radiation-induced DNA repair foci in the colon cancer cell lines using immunofluorescence staining. DNA repair proteins get activated at the DNA damage site; therefore, we can detect them using specific antibodies and visualize them under a fluorescence microscope.
FAQs
The signal depends on how the selected dye associates with DNA. Some stains interact with DNA bases, whereas others bind to the molecule’s negatively charged phosphate backbone. After binding, the stain either produces visible color or emits fluorescence when exposed to appropriate illumination. This chemistry determines how researchers detect DNA and which viewing conditions are needed.
Illumination determines whether a stain’s signal can be observed. Fluorescent dyes require appropriate light to emit a detectable signal, while color-producing stains are examined through their visible color. Consequently, the same basic goal of detecting DNA may involve different observation conditions, and researchers must match the viewing approach to the stain used.
Within an agarose gel, stained bands provide two key observations: whether DNA is present and the approximate size of the separated fragments. The visible pattern allows researchers to evaluate molecular biology experiments and compare samples. Because the result is read from bands rather than an undifferentiated signal, staining links DNA detection with fragment-level analysis.
A basic workflow connects DNA in an agarose gel, a selected stain, appropriate illumination, and interpretation of visible bands. Researchers use the resulting pattern to assess whether DNA is present and to estimate fragment sizes. The procedure therefore supports both experimental quality checking and comparisons among molecular biology samples.
Outside gel analysis, staining makes genetic material observable in microscopic settings. This supports examination of chromosomes and helps researchers study genome organization and cellular division. Its value is not limited to detecting whether DNA exists; visible genetic material can also be considered in relation to chromosome structure and biological changes associated with cell division.
Stained DNA patterns give researchers a visual basis for comparing samples in molecular biology experiments. Differences in whether DNA is detected, along with differences in the approximate sizes of fragments represented by gel bands, can help distinguish sample results. In microscopy, the same approach contributes to comparisons involving chromosomes, genome organization, and cellular division.