Guanine

One of the four bases in DNA that make up the letters ATGC, guanine is the "G". The others are adenine, cytosine, and thymine. Guanine always pairs with cytosine.
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Guanine (G)
Guanine is a purine base (nitrogenous base) and constituent of nucleotides and as such one member of the base pair G-C (guanine and cytosine).
Related Terms: Purine ...
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Guanine
These hydrogen bonding modes are for classical Watson-Crick base pairing. Other hydrogen bonding modes are seen in both DNA and RNA.
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Guanine: A nitrogenous base. Pairs with cytosine in DNA molecules.
Meiosis: the process of cell division in which a single cell produces four daughter cells each of which contains half of the number of chromosomes of the parent cell.
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Guanine (G) A nitrogenous base, one member of the base pair GC (guanine and cytosine) in DNA.
See also: base pair, nucleotide ...
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Guanine (G): A base; one of the molecular components of DNA and RNA. Always bonds with cytosine (G-C).
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guanine One of the nitrogenous bases in nucleic acids, guanine is one of the two purine bases. PICTURE
gymnosperms Flowerless, seed-bearing land plants; the ?rst seed plants; living groups include the pines, ginkgos, and cycads. Naked seeds.
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guanine A white crystalline purine base, C5H5N5O, occurring in various animal tissues and in guano and other animal excrements.
guano The accumulation of the excrement of seabirds.
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Guanine (G): A nitrogenous base found in DNA and RNA, one member of the base pair G- C (guanine and cytosine). (2-amino-6-hydroxypurine).
Gyrase: An enzymatic activity responsible for maintaining supercoiling in DNA.
H ...
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G: Guanine A: Adenine T: Thymine C: Cytosine U: Uracil not present in DNA, but takes the place of Thymine in RNA
The third and fourth letters indicate the length of the attached phosphate chain (Mono-, Di-, Tri-) and the presence of a phosphate (P).
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O6-methylguanine DNA methyltransferase is the protein product of the ada gene. It transfers the methyl group from guanine to cysteine residues within its structure. The protein has a cavity accomodating a base flipped out of the DNA double helix.
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A methylated guanine residue added in reverse polarity (ie 3'pMeG5'ppp5'NpNp3') to the 5' end of eukaryotic mRNA during transcription initiation. The cap binds a cap binding protein and acts as an initial binding site for ribosomes during translation.
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: A methylated guanine residue (
GTP
), which is added to the 5' end of eukaryotic mRNAs in a post-transcriptional reaction. It protects the mRNA against 5'-exonuclease, stabilises the mRNA and enhances its translation. The cap contains a 7-methyl ...
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A pair of complementary nitrogenous bases in a DNA molecule--adenine-thymine and guanine-cytosine. Also, the unit of measurement for DNA sequences. Bioaugmentation.
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Base sequence -- a partnership of organic bases found in DNA and RNA; adenine forms a base pair with thymine (or uracil) and guanine with cytosine in a double-stranded nucleic acid molecule.
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This is a modified guanine (G) which is attached to the 5′ end of the pre-mRNA as it emerges from RNA polymerase II (RNAP II). The cap protects the RNA from being degraded by enzymes that degrade RNA from the 5′ end.
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An organic acid and polymer composed of four nitrogenous bases--adenine, thymine, cytosine, and guanine linked via intervening units of phosphate and the pentose sugar deoxyribose.
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In the case of DNA this is comprised of adenine (A), guanine (G), cytosine (C) and thymine (T). RNA is identical with the exception that thymine (T) is substituted with uracil (U). Codons are non-overlapping groups of the three bases.
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For example, thioproline is an analog of the amino acid proline, and azaguanine is an analog of the nucleotide guanine.
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Included in this group are the nucleoside analogs, chemicals that are similar to one of the bases (adenine, cytosine, guanine, and thymine) that comprise DNA, but sufficiently different enough to block viral DNA synthesis.
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PURINE BASES - Adenine (A) or Guanine (G) (see NUCLEOTIDE).
PULSED-FIELD GEL ELECTROPHORESIS (PFGE) - Separation of large (>50 kb) pieces of DNA, including complete chromosomes and genomes, ...
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purine base; basic compounds related in structure to uric acid; examples include adenine and guanine, which are bases and constituents of nucleic acids
Source: Noland, George B. 1983. General Biology, 11th Edition. St. Louis, MO. C. V. Mosby ...
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A nitrogenous base, such as adenine or guanine, with a characteristic two-ring structure; one of the components of nucleic acids.
pyramid, ecological
See Ecological pyramid.
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complementary base pairs - base-pairing between a larger purine base (adenine or guanine) and a smaller pyrimidine base (cytosine or thymine) while DNA is in its double-helix. (A/T, G/C) ...
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The adenine of one strand is always hydrogen-bonded to a thymine on the other. Similarly, Guanine is always paired with Cytosine.
A-T
G-C ...
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There are four different kinds of nucleotides: adenine (A), guanine (G), cytosine (C) and thymine (T). Genes are sequences of nucleotides that code for proteins. Within a gene, each block of three nucleotides is called a codon.
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purine: a type of nitrogenous base present in DNA molecules containing two fused rings of carbon and nitrogen atoms; two examples in DNA are adenine (A) and guanine (G).
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messenger RNA (mRNA) A class of RNA molecules, each of which is complementary to one strand of DNA, characterized by a 5' 7-N-methylguanine cap and a 3' polyA tail. Its function is to carry the genetic message from the chromosome to the ribosomes.
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