DNA was thought to contain equal amounts of A, T, T, and C. Chargaff found that the
base composition of
DNA differs among
species.
Full article >>>DNA Under an electron
microscopeOther interesting points:
DNA is an acid because of the
phosphate groups between each
deoxyribose. This is the primary reason why
DNA has a negative charge.
Full article >>>DNA polymerase I
Because all four normal
nucleotides are present, chain elongation proceeds normally until, by chance, ...
Full article >>>DNA (
deoxyribose nucleic acid)
a helical,
double stranded molecule composed of four different
nucleotide subuints (A, T, G, and C) that carries the genetic instructions from one generation to the next ...
Full article >>>DNA methylationA post-
replication process.
Cytosine residues in CpG
sequences are methylated, forming
gene-specific
methylation patterns.
Methylation of
promoter regions correlates with
gene expression patterns.
Related ...
Full article >>>DNA is a very large
molecule; the image here shows only a tiny fr
action of the typical
molecule. If an entire
molecule of
DNA from the
virus "
bacteriophage lambda" were shown at this
scale, the image would be 970 meters high.
Full article >>>DNA RepairMultiple systems for repairing damage to
DNA have evolved, probably because of the importance of the
DNA information content.
Full article >>>DNA Replication Complex Revealed in Exquisite Detail
A team of Harvard Medical School researchers have established the 3-dimensional,
atom-by-
atom structure of T7
DNA polymerase at work.
Full article >>>DNA is a
double helix, with
bases to the center (like rungs on a ladder) and sugar-phosphate units along the sides of the helix (like the sides of a twisted ladder).
Full article >>>Search for
DNA in these other data
bases too
Definition of
DNA :
See
deoxyribonucleic acid.
Full article >>>A section of
DNA that has been
inserted into a
vector molecule, such as a
plasmid or a
phage chromosome, and then replicated to form many identical copies. See also
cloneA 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 >>>DNA in brief
This section presents a brief and simple overview of
DNA.
Genes can be loosely viewed as the
organism's "cookbook"; ...
Full article >>>DNA (
deoxyribonucleic acid): the
molecule that encodes genetic information.
DNA is composed of two anti-parallel
strands which wind about a common axis to form a
double helix.
Full article >>>The
strand of
DNA that does not carry the information necessary to make a
protein. The
non-coding strand is the mirror image of the
coding strand and is also known as the
antisense strand.
explained:
Listen to a detailed explanation.
Full article >>>We have undertaken genomic
transplantation studies involving the
transfer of
mitochondrial DNA (
mtDNA) from PD patients with a complex-I defect to a novel nuclear background.
Full article >>>DNA Repair Genes
A third type of
gene associated with
cancer is the group involved in
DNA repair and maintenance of
chromosome structure.
Environmental factors, such asionizing radiation, UV light, and chemicals, can damage
DNA.
Full article >>>DNA fingerprintingMethod of isolating and visualizing of
sequences of
DNA developed in 1984 by Alec Jeffreys.
Full article >>>DNA: the Instruction Manual for All Life
Cell Biology Animations:
DNA-structure,
replication,
transcription, and
translationDNA-
RNA-
Protein Synthesis (hands-on learning module) ...
Full article >>>DNA sequencing: Determining the
order of
bases in a
segment of
DNA.
Domi nant
gene: A
gene which, when present on a
chromosome, passes on a certain physical
characteristic, thereby dominating over a
recessive gene present on another
chromosome.
Full article >>>DNA (
Deoxyribonucleic acid). 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.
Full article >>>DNA transcription - process in which
molecules of
RNA are synthesized in which a
strand of
DNA acts as a
template.
dolichol - special
lipid molecule that holds precursor oligosaccharides, prior to addition to
proteins in the ER membrane ...
Full article >>>DNA gyrase A
topoisomerase that removes
supercoils from
DNA by first producing double-
strand breaks and then sealing them.
Full article >>>DNA ligase(ly-gaze)
width="400" valign="TOP"
A linking
enzyme essential for
DNA replication; catalyzes the covalent bonding of the 3' end of a new
DNA fragment to the 5' end of a growing chain.
Full article >>>DNA fingerprinting: a technique that uses
electrophoresis to match
DNA molecules to one another for identification purposes.
DNA polymerase: the
enzyme that joins all the
nucleotide components to one another to form a
long strand of
nucleotides.
Full article >>>DNA POLYMERASE - A
polymerase which synthesizes
DNA (see
POLYMERASE).
DNase - see
DEOXYRIBONUCLEASE.
Full article >>>DNA ligase -
protein that joins (ligates)
DNA strands; used by
cells for
DNA repair, by molecular
biologists for
gene cloning.
Full article >>>DNA sequenced from 17-20 MY old magnolia
In the paper I explain here, the authors (Golenberg et. al., 1990)
sequenced an 820 bp region (the rbcL
gene) from the
chloroplast DNA of a compression
fossil of a magnolia.
Full article >>>DNA Deoxyribonucleic acid; the
long, double-helix
molecule in the
nucleus of
cells that contains the
genetic code and directs the development and functioning of all
cells.
Full article >>>DNA (
deoxyribonucleic acid): The
molecule responsible for storing and
transmitting genetic information.
Full article >>>DNA Polymerase: A group of
enzymes mainly involved in copying a single-
stranded
DNA molecule to make its
complementary
strand. Eukaryotic
DNA polymerases participate in chromosomal
replication, repair,
crossing-over and
mitochondrial
replication.
Full article >>>A
DNA open reading frame:
...ATG ACA TGT AAA GAT AGA CTA ACC TTT TGG... ...Met Thr Cys Lys Asp Arg Leu Thr Phe Trp...
Same
bases, different 'frame': ...
Full article >>>the
DNA strand is
expressed into a
trait only if it is
transcribed to
RNA.
Full article >>>Satellite DNA A
genomic DNA fr
action which has a different density to the main body of
genomic DNA and therefore forms a separate
band (satellite) during density gradient ultracentrifugation.
Full article >>>Ribosomal DNA genes The genes that make the three
RNA components of the
ribosome - the particle (also containing 60 or more
proteins) that is responsible for making
proteins within the
cell.
Full article >>>lagging strand The
DNA strand that, during
replication, must be synthesized in the direction opposite to that in which the
replication fork moves. Synthesized via a series of fragments called
Okazaki fragments.
Full article >>>A matrix composed of a highly purified form of agar that is used to separate larger
DNA and
RNA molecules ranging 20,000
nucleotides. (See
Electrophoresis.)
Alleles.
Full article >>>Alu repetitive
sequence -- the most common dispersed repeated
DNA sequence in the
human genome accounting for 5% of
human DNA. The name is derived from the fact that these
sequences are cleaved by the
restriction endonuclease Alu.
Full article >>>DNA -
deoxyribonucleic acid is the double-helix
molecule holding the genetic information of
organisms that, along with
protein, composes the
chromatin ...
Full article >>>Polynucleotides are either
RNA or
DNA.
They guide the formation of exact copies of their own
sequence through
complementary pairing of
nucleotides subunits (U with A and G with C).
Full article >>>Contains
DNA and mito
ribosomes. Has a double membrane and the inner membrane may contain numerous folds (
cristae). The inner fluid phase has most of the
enzymes of the tricarboxylic acid cycle and some of the
urea cycle.
Full article >>> DeoxyribonucleicAcid(
DNA) the
genetic code material consisting of pairs of
nitrogenous bases bonded to a "ladder" of phosphate and ribose
molecules
(de = from down out; deoxy = without
oxygen) ...
Full article >>>Definition: Mass of
genetic material composed of
DNA and
proteins that condense to form
chromosomes in eukaryotic
cell division.
Chromatin is located in the
cell's
nucleus.
Full article >>>Ballistic particle-mediated
gene transfer.
Complementary DNA molecules are adsorbed to gold particles and shot by a pressure gas jet into
tissues or
culture cells.
HIGH-PRESSURE FREEZING ...
Full article >>>double strandedtwo adjacent
strands. For example
DNA has two adjacent poly
nucleotide strands wound into a spiral shape.
duodenumPart of the
small intestine connecting the
stomach to the
ileum.
Covered in: ...
Full article >>>The components of a typical prokaryotic
cell are a
cell wall, a
cytoplasmic membrane, a single
molecule of
DNA,
ribosomes and the
cytoplasm. All other components, although they might be present, are essentially dispensable.
Full article >>>All
organisms pass on their
heredity via the
genetic material which is based upon the
nucleic acid DNA using a universal
genetic code.
Full article >>>'"/>