Methyl Cation
Methyl Cation - Related Videos
08:47
DNA Methylation Analysis
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2023
Methylation at CpG dinucleotides is a chemical modification of DNA hypothesized to play important roles in regulating gene expression. In particular, the methylation of clusters of methylation sites, called “CpG islands”, near promoters and other gene regulatory elements may contribute to the stable silencing of genes, for example, during epigenetic processes such as genomic imprinting and X-chromosome inactivation. At the same time, aberrant CpG methylation has been shown to be associated with...
21:24
Methylated DNA Immunoprecipitation
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Cited by 43 •
2009
This video demonstrates the protocol for methylated DNA immunoprecipitation (MeDIP). MeDIP is a two day procedure that selectively extracts methylated DNA fragments from a genomic DNA sample using antibodies with specificity for 5 -methylcytosine (anti-5 mC).
12:34
DNA Methylation: Bisulphite Modification and Analysis
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Cited by 75 •
2011
The gold standard for DNA methylation analysis is genomic sequencing of bisulphite converted DNA. This method takes advantage of the increased sensitivity of cytosine compared with 5-methylcytosine (5-MeC) to bisulphite deamination under acidic conditions. Unmethylated cytosines can be distinguished from methylated cytosines after PCR amplification of the target genomic DNA.
10:23
Synthesis of Cationized Magnetoferritin for Ultra-fast Magnetization of Cells
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Cited by 1 •
2016
A protocol for the synthesis and cationization of cobalt-doped magnetoferritin is presented, as well as a method to rapidly magnetize stem cells with cationized magnetoferritin.
13:21
Comprehensive DNA Methylation Analysis Using a Methyl-CpG-binding Domain Capture-based Method in Chronic Lymphocytic Leukemia Patients
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Cited by 2 •
2017
This work describes an optimized methyl-CpG-binding domain (MBD) sequencing protocol and a computational pipeline to identify differentially methylated CpG-rich regions in chronic lymphocytic leukemia (CLL) patients.
FAQs
The empty p orbital provides an available region for accepting electron density, which accounts for the methyl cation’s strong electrophilic behavior. This electronic feature makes the species useful for analyzing how electron density is transferred during organic reactions. In mechanistic studies, the orbital description connects molecular structure with the tendency of this short-lived intermediate to react rapidly.
Its electron deficiency makes the methyl cation highly unstable, so it does not usually persist as an isolable species. Instead, it appears only briefly when suitable ionization or bond-cleavage processes generate it under specialized conditions. This limited lifetime is important because studies must focus on transient formation, energetics, or reaction behavior rather than routine handling.
Energetics help determine whether formation of the methyl cation is feasible under a particular set of conditions and how strongly the species is favored as a transient intermediate. Examining these energy relationships supports mechanistic analysis of ionization and bond cleavage. It also provides a basis for comparing calculated behavior with observations from gas-phase chemistry.
Ionization and bond cleavage can separate the methyl fragment from an attached group, creating the electron-deficient carbon species as a short-lived intermediate. The specific process is studied under specialized conditions because the product is highly unstable. Following such formation pathways helps chemists connect a reaction’s initial bond-breaking event with subsequent carbocation reactivity.
Gas-phase studies provide a way to examine this fleeting species without requiring it to remain stable in an ordinary condensed-phase environment. Researchers can investigate its formation, energetics, and reactions after ionization or bond cleavage. These observations help clarify intrinsic carbocation behavior and support mechanistic interpretations that may be difficult to isolate from solution effects.
Methyl cation chemistry supports interpretation of mass spectra by helping relate ion formation and bond cleavage to observed gas-phase species. Its study gives mechanistic context for understanding how fragmentation processes can generate electron-deficient carbon fragments. Consequently, the species serves as a useful model when analyzing the chemical meaning of mass-spectral patterns.
Because it has a simple composition but pronounced electron deficiency, methyl cation provides a focused system for modeling carbocation structure, energetics, and reactions. Computational studies can examine the empty p orbital and the energy associated with transient formation. These results contribute to broader models of organic reactivity and help interpret gas-phase experimental behavior.