Guanine Cytosine
Guanine Cytosine - Related Videos
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.
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...
07:16
Rapid and Efficient Spatiotemporal Monitoring of Normal and Aberrant Cytosine Methylation within Intact Zebrafish Embryos
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Cited by 3 •
2022
This paper describes a protocol for the rapid and efficient spatiotemporal monitoring of normal and aberrant cytosine methylation within intact zebrafish embryos.
01:23
RNA Structure
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2019
Overview The basic structure of RNA consists of a five-carbon sugar and one of four nitrogenous bases. Although most RNA is single-stranded, it can form complex secondary and tertiary structures. Such structures play essential roles in the regulation of transcription and translation. Different Types of RNA Have the Same Basic Structure There are three main types of ribonucleic acid (RNA): messenger RNA (mRNA), transfer RNA (tRNA), and ribosomal RNA (rRNA). All three RNA types consist of a...
FAQs
The three-hydrogen-bond arrangement depends on the alignment of guanine’s carbonyl group and ring nitrogens with complementary functional groups on cytosine. This precise donor and acceptor matching supports selective pairing rather than arbitrary contact between nucleobases. Within DNA or RNA, the surrounding sugar-phosphate backbone holds the bases in the geometry needed for that interaction to contribute to duplex organization.
Hydrogen bonds alone do not determine the full structural context of the pair. The sugar-phosphate backbone positions guanine and cytosine inside the nucleic-acid strand, allowing their functional groups to align across the duplex. This arrangement helps translate molecular recognition into a stable, organized structure, which is why pairing must be considered together with the backbone rather than as an isolated chemical interaction.
GC content describes the proportion of guanine-cytosine pairs in a nucleic-acid sequence and is associated with duplex stability and melting temperature. Because these pairs contribute three hydrogen bonds, changes in their proportion can affect how readily a duplex separates during heating. Researchers therefore use GC content and melting temperature together when evaluating nucleic-acid structure and hybridization behavior.
The complementary guanine-cytosine interaction occurs in both DNA and RNA when these bases are present. The pairing principle therefore remains relevant across the two types of genetic material, while the surrounding nucleic-acid context determines how the bases are organized. This shared chemistry allows researchers to examine related questions about duplex stability, structure, and hybridization in either material.
Researchers assess GC content and related melting-temperature behavior when designing primers and probes. These values provide information about how strongly a sequence may participate in nucleic-acid pairing and how its duplex may respond to heating. The assessment helps connect the chemical properties of guanine-cytosine-rich sequences with practical choices in experiments involving sequence recognition and hybridization.
Guanine-cytosine pairing provides a chemical framework for interpreting sequence composition, hybridization behavior, and changes in nucleic-acid structure. In sequencing studies, GC content helps researchers assess sequence characteristics, while mutation studies can examine how altered pairing affects duplex behavior. These applications connect nucleobase chemistry with the analysis of genetic information and structural consequences.