euchromatin sentence in Hindi
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- After stimulation of the neutrophil response, neutrophils lose their shape, allowing euchromatin and heterochromatin to homogenize, later resulting in the mixing of NET components.
- Not all euchromatin is necessarily transcribed, but in general that which is not is transformed into heterochromatin to protect the genes while they are not in use.
- One example of constitutive euchromatin that is'always turned on'is housekeeping genes, which code for the proteins needed for basic functions of cell survival.
- In general, euchromatin appears as light-colored bands when stained in G banding and observed under an nucleus, possibly as a mechanism to handle increasing genome size.
- In eukaryotes the structure of chromatin, controlled by the histone code, regulates access to DNA with significant impacts on the expression of genes in euchromatin and heterochromatin areas.
- These results indicate a decrease in the level of active euchromatin epigenetic marks upon initiation of embryonic stem cell differentiation which is then followed immediately by reprogramming of the epigenome.
- Euchromatin is the less compact DNA form, and contains genes that are frequently " constitutive " heterochromatin that consists of chromosome structural components such as telomeres and centromeres.
- Electron microscopic studies in 3 cases described intracytoplasmic mucin, convoluted oval nuclei, prominent nucleoli, homogeneous euchromatin with peripheral chromatin condensation, microvilli, junctional complexes, and primitive lumen formation.
- Nucleosomes consist of eight proteins known as histones, with approximately 147 base pairs of DNA wound around them; in euchromatin, this wrapping is loose so that the raw DNA may be accessed.
- It is known that methylation of histones often serve as marks that cause the formation of heterochromatin, an inactive form of chromatin, while acetylation often marks euchromatin, an active form of chromatin.
- In addition, four mutated retrotransposon insertions were shown to have simulated the entire existence of additional ancestral duplicons illustrating the need for sequencing of the euchromatin / heterochromatin transition regions for these mammals . [ 9]
- Specifically, special roX non-coding RNAs on the MSL complexes facilitate binding to the single male X chromosome, and dictate acetylation of specific loci along the X chromosome as well as the formation of euchromatin.
- It is thought that the cell uses transformation from euchromatin into heterochromatin as a method of controlling gene expression and replication, since such processes behave differently on densely compacted chromatin, known as the ` accessibility hypothesis '.
- As the embryonic stem cell undergoes differentiation the markers for active euchromatin ( histone acetylation and " H3K4 " methylation ) are decreased after the removal of LIF showing that the cell is indeed becoming more differentiated.
- The result of the various changes in gene expression is the conversion of heterochromatin, which is very difficult to access, to euchromatin, which can be easily accessed by transcriptional proteins and enzymes such as RNA polymerase.
- Cytosine methylation is examined at " H3K9 ", which is associated with inactive heterochromatin and occurs mainly at CpG dinucleotides while global acetylation is examined at " H3K4 ", which is associated with active euchromatin.
- To probe chromatin environments, her lab developed a P element construct with a copy of the heterochromatic environments, the fly eyes display a vareigating phenotype, whereas when the P element is inserted into euchromatin the fly eyes show a red phenotype; this phenomenon is known as Position-effect variegation.
- Centric heterochromatin is usually formed on alpha satellite DNA in humans; however, there have been cases where centric heterochromatin and centromeres have formed on originally euchromatin domains lacking alpha satellite DNA; this usually happens as a result of a chromosome breakage event and the formed centromere is called a " neocentromere ".
- In essence, it is the cumulative effect of many types of interactions that leads to the difference between euchromatin, which is not tightly packed and generally more accessible to transcriptional machinery, and heterochromatin, which is tightly packed and generally not accessible to transcriptional machinery; SINEs seem to play an evolutionary role in this process.
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