Modified Cytosine Bases
Modified Cytosine Bases - Related Videos
07:13
Detection of Modified Forms of Cytosine Using Sensitive Immunohistochemistry
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Cited by 8 •
2016
Herein we describe a sensitive immunochemical method for mapping the spatial distribution of 5mC oxidation derivatives based on the use of peroxidase-conjugated secondary antibodies and tyramide signal amplification.
02:27
DNA Base Pairing
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2020
Erwin Chargaff’s rules on DNA equivalence paved the way for the discovery of base pairing in DNA. Chargaff’s rules state that in a double-stranded DNA molecule, the amount of adenine (A) is equal to the amount of thymine (T); the amount of guanine (G) is equal to the amount of cytosine (C); and the sum of purines, A and G, is equal to the sum of pyrimidines, C and T (i.e., A+G = C+T). Later work by Watson and Crick revealed that in double-stranded DNA, A always forms two hydrogen bonds...
12:13
TransFLP — A Method to Genetically Modify Vibrio cholerae Based on Natural Transformation and FLP-recombination
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Cited by 37 •
2012
A quick method to modify the genome of V. cholerae is described. These modifications include the deletion of single genes, gene clusters and genomic islands as well as the integration of short sequences (e.g. promoter elements or affinity-tag sequences). The method is based on the natural transformation and FLP-recombination.
12:45
Testing For Genetically Modified Foods
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2023
Source: Laboratories of Margaret Workman and Kimberly Frye - Depaul University Genetic modification of foods has been a controversial issue due to debated concerns over health and environmental safety. This experiment demonstrates technical understanding of how food DNA is genetically identified, allowing for educated decision making about the safety and potential dangers of using genetically modified organisms (GMOs) in food supplies. Polymerase Chain Reaction (PCR) is used to amplify food DNA...
08:22
A Robust Polymerase Chain Reaction-based Assay for Quantifying Cytosine-guanine-guanine Trinucleotide Repeats in Fragile X Mental Retardation-1 Gene
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2019
An accurate and robust polymerase chain reaction-based assay for quantifying cytosine-guanine-guanine trinucleotide repeats in the Fragile X mental retardation-1 gene facilitates molecular diagnosis and screening of Fragile X syndrome and Fragile X-related disorders with shorter turn-around time and investment in equipment.
FAQs
Enzymatic modification changes the chemical features presented by a cytosine base without changing the surrounding genetic sequence. Those altered features can influence how DNA-binding proteins and chromatin-associated factors recognize or interact with the DNA. As a result, the modification can contribute to gene regulation by changing molecular contacts at particular genomic locations.
These two modified bases illustrate how distinct chemical forms of cytosine can contribute to biological regulation. Both arise through enzymatic modification, yet their presence provides different molecular states for examining interactions with DNA-binding proteins and chromatin-associated factors. Comparing them helps researchers investigate how chemical information is connected to gene regulation and cellular behavior.
Modified cytosine bases can affect the interactions between DNA and chromatin-associated factors. Those interactions help determine how chemical information embedded in DNA is interpreted within the chromatin environment. Studying this relationship clarifies how changes to a nucleobase may influence gene regulation without requiring a change to the underlying genetic sequence itself.
Their importance extends beyond individual DNA-protein interactions. Modified cytosine bases are studied in relation to genome stability and cellular differentiation, two processes that help explain how cells maintain genetic information and acquire specialized states. Biochemical investigation therefore connects these bases with broader questions about cellular regulation, development, and disease mechanisms.
Detection and analysis provide a way to investigate the presence and biological significance of chemically altered cytosine bases in DNA and RNA. These approaches support studies of gene regulation, genome stability, and cellular differentiation. They also help connect molecular observations with development, disease mechanisms, and the evaluation of potential biomarkers.
They are examined as potential biomarkers when researchers seek molecular information associated with development or disease mechanisms. Their analysis can reveal chemically encoded information relevant to cellular regulation and genome stability. This makes modified cytosine bases useful in research that connects biochemical changes with biological states, although their interpretation depends on the surrounding scientific context.