pyrimidineimportant
organic
compounds (
bases) such as
cytosine,
thymine, and
uracil, which are constituents of
nucleic acidsSource: Noland, George B. 1983. General
Biology, 11th Edition. St. Louis, MO. C. V. Mosby ...
Full article >>>Pyrimidine de novo biosynthesis
Unlike
purines,
pyrimidines are assembled before being attached to 5-phosphoribosyl-1-pyrophosphate (PRPP). The first step begins with formation of carbamoyl phosphate by carbamoyl phosphate synthetase II.
Full article >>>Pyrimidine Chemical name
Pyrimidine Chemical formulaC4H4N2 Molecular mass80.09 g/mol Density1.016 g/ml
Melting point20 - 22 C Boiling point123 - 124 C CAS number289-95-2 SMILESC1=NC=NC=C1 ...
Full article >>>PyrimidineA nitrogen-containing, single-ring, basic
compound (cf.
nitrogenous base) that occurs in
nucleic acids. The
pyrimidines in
DNA are
cytosine and
thymine. The
pyrimidines in
RNA are
cytosine and
uracil.
Adenine (A) ...
Full article >>>Pyrimidine: A nitrogen containing, single ring
compound that occurs in
nucleic acids. In
DNA molecules, the
pyrimidines are
cytosine and
thymine.
Radioactive phosphorus (32P): radioactive isotope of 31P, an element found in
DNA molecules.
Full article >>>pyrimidine: a type of
nitrogenous base in
DNA molecules that has one ring containing carbon and nitrogen atoms; two examples in
DNA are
cytosine (C) and
thymine (T).
A-D E-K
L-P
R-Z ...
Full article >>>Pyrimidine dimers
Covalent bonds formed between two adjacent
pyrimidines on the same
strand of
DNA induced by Ultraviolet irradiation.
Full article >>>pyrimidine One of the groups of
nitrogenous bases that are part of a
nucleotide.
Pyrimidines are single ringed, and consist of the
bases thymine (in
DNA),
uracil (replacing
thymine in
RNA), and
cytosine. PICTURE ...
Full article >>>pyrimidineA
nitrogenous base, such as
cytosine,
thymine, or
uracil, with a
characteristic single-ring structure; one of the components of
nucleic acids.
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Full article >>>PYRIMIDINE BASES -
Cytosine (C),
Thymine (T) or
Uracil (U) (see
NUCLEOTIDE).
Full article >>>pyrimidine An
organic
base composed of a single ring of carbon and nitrogen atoms; parent substance of several
bases found in
nucleic acids.
pyrogenic Substance that causes a rise in body temperature; causes fever.
Full article >>>Pyrimidine: A nitrogen- containing, double- ring, basic
compound that occurs in
nucleic acids. The
pyrimidines in
DNA are
cytosine and
thymine; in
RNA,
cytosine and
uracil.
R ...
Full article >>>A
pyrimidine base that appears in
RNA in place of
thymine found in
DNA. See
pyrimidine.
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z ...
Full article >>>purines and
pyrimidines
polyols —
compounds with hydroxyl groups on a backbone of 3 to 6 carbons such as glycerol and glyceric acid. Sugars are polyols.
the
amino acids listed here.
Full article >>>The
purines (
adenine and
guanine) and
pyrimidines (
thymine,
cytosine, and
uracil) that comprise
DNA and
RNA molecules.
Nodule. The enlargement or swelling on
roots of nitrogen- fixing
plants. The
nodules contain symbiotic nitrogen- fixing
bacteria.
Full article >>>base pair a pair of hydrogen-bonded
nitrogenous bases (one
purine and one
pyrimidine) that join the component
strands of the
DNA double helix.
Full article >>>prox- besides pseudo- false
purine A nitrogenous heterocyclic
base found in
nucleotides and
nucleic acids; containing fused
pyrimidine and imidazole rings, having the general form.
Full article >>>We first map the whole
genomic DNA sequences following
purine-
pyrimidine binary rule: change
purines (A/G) to +1 and
pyrimidines (C/T) to -1. This creates a '
DNA walk' along the
genome.
Full article >>>Transitions (changes from a
purine - A or G - to the other
purine, or a
pyrimidine - C or T - to the other
pyrimidine) are more likely than
transversions (changes from a
purine to a
pyrimidine or vice-versa).
Full article >>>Since
transition mutations (
purine to
purine or
pyrimidine to
pyrimidine mutations) are more likely than
transversion (
purine to
pyrimidine or vice-versa)
mutations, ...
Full article >>>Substitution mutations from one
pyrimidine to another or one
purine to another (horizontals in diagram) are called
transitions.
Mutations from a
pyrimidine to a
purine, or the reverse (verticals and diagonals in diagram), are called
transversions.
Full article >>>Chargaff's rules showed that A = T and G = C, so there was
complementary
base pairing of a
purine with a
pyrimidine, giving the correct width for the helix.
The paired
bases can occur in any
order, giving an overwhelming diversity of
sequences.
Full article >>>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) ...
Full article >>>A single-
stranded
nucleic acid similar to
DNA but having ribose sugar rather than
deoxyribose sugar and
uracil rather than
thymine as one of the
pyrimidine bases.
Also known as:
ribonucleic acid ...
Full article >>>'"/>