Methyl Green

Methyl Green is a basic dye used to stain chromatin and, together with pyronine, to differentiate the colors of RNA and DNA molecules, which respectively acquire red and green colors.

Methyl green was first synthesized in 1876 by German chemist Heinrich Caro. It is a basic cationic dye that selectively binds to negatively charged cellular components such as DNA and RNA.

When used in conjunction with another basic dye, pyronine Y, methyl green can differentially stain nucleic acids. Methyl green binds to DNA and colors it green, while pyronine Y binds to RNA and colors it red. This allows the two molecules to be easily distinguished under a microscope.

Methyl green is also used in histology to identify chromatin and other basophilic structures. It provides a good contrast with eosin, which stains the cytoplasm pink.

Thus, methyl green is a useful dye for visualizing and differentiating nucleic acids and other structures in cells and tissues. Its selective binding to negatively charged molecules makes it an indispensable tool in histology and cytology.



Methyl Green is a basic dye used to stain chromatin and, together with pyronine, to differentiate the colors of RNA and DNA molecules, which respectively acquire red and green colors.

Methyl green is a basic dye, which is a dye that stains negatively charged cellular structures such as DNA and RNA. It is used in histology and cytology to identify structures containing nucleic acids.

When methyl green is used in combination with another basic dye, pyronine, it is possible to differentiate between RNA and DNA in a cell. Pyronine colors RNA red, and methyl green gives green color to DNA. This staining makes it possible to clearly distinguish these two nucleic acids in cell preparations.

In addition, methyl green is used to identify chromatin, a complex of DNA and proteins. It stains chromatin green or bluish-green, allowing examination of the structure and distribution of chromatin in the cell.

Thus, methyl green is a convenient and informative dye for studying cellular structures containing nucleic acids. Its use in combination with other dyes makes it possible to differentially stain various cellular components.



Methyl Green is an organic dye that is widely used in biology and microbiology to stain cells and tissues. It was first synthesized in 1879 and has since become one of the most common dyes in biological research.

Methyl Green is a primary dye used to color chromatin, the basic structure of a chromosome made up of DNA, RNA and proteins. It is also used in combination with another dye, pyronine, to differentially stain RNA and DNA molecules, which appear red and green, respectively.

Methyl Green is green in color and allows researchers to easily visualize cell and tissue structures under a microscope. It has high affinity for DNA and RNA, making it particularly useful for staining nuclear components of cells such as chromosomes, nucleoli and nuclei.

In microbiology, Methyl Green is used to stain bacteria to see their shape, size and location. It can also be used to stain fungi and other microorganisms.

Additionally, Methyl Green can be used to diagnose tumors as it is able to bind to certain proteins that are often present in tumors.

Although Methyl Green has many applications in biology and microbiology, its use may have some limitations and disadvantages. For example, it can be toxic to living cells at high concentrations and can cause changes in the structure of cells and tissues.

Overall, Methyl Green is an important tool for biological research, allowing researchers to visualize the structures of cells and tissues, as well as for the diagnosis of tumors. However, its use must be done with caution and necessary precautions.