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Gene Conversion02:08

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Other than maintaining genome stability via DNA repair, homologous recombination plays an important role in diversifying the genome. In fact, the recombination of sequences forms the molecular basis of genomic evolution. Random and non-random permutations of genomic sequences create a library of new amalgamated sequences. These newly formed genomes can determine the fitness and survival of cells. In bacteria, homologous and non-homologous types of recombination lead to the evolution of new...
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The development of extended-release formulations has facilitated the transition from intravenous to oral medication, offering a more convenient and patient-friendly approach to drug administration. This transition, however, requires careful management to ensure that therapeutic drug levels are maintained, preserving efficacy and avoiding adverse effects. Understanding pharmacokinetic principles and dosage calculations is critical during this process.Pharmacokinetics of the...
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Sometimes, there is a need to convert from one unit to another one. For instance, reading a cookbook in which quantities are expressed in units of liters or ounces may require conversion of quantities to cups. Or, when looking up directions on how to get to a location, we may be interested to know how many miles we are going to walk. In this case, we would have to convert units of feet or meters to miles.
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Conversion of Alcohols to Alkyl Halides02:48

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This lesson delves into the conversion of alcohols to corresponding alkyl halides and the mechanism of action for different reagents. Typically, the hydroxyl group is first protonated to convert it to a stable leaving group. Consequently, based on the starting alcohol, the mechanism undergoes either of the nucleophilic substitution routes, SN1 or SN2. Tertiary alkyl halides are made using the two-step SN1 mechanism that occurs via a carbocation intermediate, which is stabilized by...
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Comprehensive DNA Methylation Analysis Using a Methyl-CpG-binding Domain Capture-based Method in Chronic Lymphocytic Leukemia Patients
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Methods for CpG Methylation Array Profiling Via Bisulfite Conversion.

Fatjon Leti1, Lorida Llaci2, Ivana Malenica3

  • 1Center for Genes, Environment and Health, Department of Biomedical Research, National Jewish Health, 1400 Jackson Street, Denver, CO, 80206, USA. letif@njhealth.org.

Methods in Molecular Biology (Clifton, N.J.)
|February 10, 2018
PubMed
Summary
This summary is machine-generated.

DNA methylation, a crucial epigenetic regulator, is vital in disease and development. This chapter details an array-based protocol for identifying methylated DNA regions using bisulfite conversion and sequencing.

Keywords:
Bisulfite conversionCpGDNAEpigeneticsMethylation

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Area of Science:

  • Epigenetics and Molecular Biology
  • Genomics and Bioinformatics

Background:

  • DNA methylation, specifically 5-methylcytosine (5mC), is a highly conserved epigenetic modification fundamental to cellular processes.
  • Aberrant DNA methylation patterns are implicated in various diseases, including cancers, and play roles in development and differentiation.

Purpose of the Study:

  • To describe an array-based protocol for identifying methylated DNA regions.
  • To provide a comprehensive overview of methods for DNA methylation analysis.

Main Methods:

  • Utilizes bisulfite conversion to differentiate between methylated and unmethylated cytosines.
  • Involves DNA quantification, bisulfite treatment, library preparation, and chip assembly.
  • Employs sequencing to detect single-nucleotide level methylation status.

Main Results:

  • The described protocol enables precise identification of methylated DNA regions.
  • Provides a framework for analyzing methylation data at a single nucleotide resolution.

Conclusions:

  • Bisulfite conversion followed by array-based methods is a robust approach for studying DNA methylation.
  • Understanding DNA methylation patterns is critical for advancing research in disease pathogenesis and developmental biology.