These
modifications (rev) do not alter the coding capacity of those
RNAs that are m
RNAs.
Code-altering changes are known.
Conversion of U to Y also is mediated by sno
RNAs in
eukaryotes. These are
characterized by a conserved box H and an ACA 3' tail.
Full article >>>Genetic
modification or genetic manipulation are claimed to be neutral and possibly more technically correct terms for what is claimed, controversially, to be
genetic engineering.
Full article >>>Chapter 3
The role of post-
translational
modification in b-amyloid precursor
protein processingNiki Georgopoulou, Mark McLaughlin, Ian McFarlane and Kieran C.Breen1 ...
Full article >>>Changes in eukaryotic m
RNA, t
RNA or other
RNAs made after
transcription has been completed. The changes to m
RNA include addition of a 5'cap and 3'
polyA tail and removal of
introns, and to t
RNA include
modification of
bases and removal of
introns.
Full article >>>Modification of
DNA;
Transcription;
Translation;
Post-
transcriptional
modification;
RNA transport;
m
RNA degradation;
Post-
translational
modifications; ...
Full article >>>Modifications for Other
VectorsImprovements to the
original optical
mapping method now allow ana
lysis of a wide range of such
cloning vectors as
cosmid,
bacteriophage, P1, ...
Full article >>>Modification (of
DNA)
The specific addition of secondary
residues (methyl, hydroxymethyl, glucosyl) to
deoxyribonucleotides by an
organism to differentiate its own
DNA from other
DNA or for regulatory purposes.
Full article >>>Modification of
RNA before it leaves the
nucleus, a process unique to
eukaryotes.
RNA splicingThe removal of noncoding portions (
introns) of the
RNA molecule after initial synthesis.
Full article >>>Modification of
DNAGene AmplificationIn
Drosophila (fruit flies), the chorion (egg
shell)
gene is copied many times in certain
cells of the
oviduct. These
cells make large quantities of the
protein needed to surround the
egg.
Full article >>>A
modification of this procedure - called 2D
gel electrophoresis - separates
proteins into two dimensions, using two different
characteristics.
Full article >>>Gene modification. The chemical repair of a
gene's defective
DNA sequence. See
DNA.
Gene pool. The totality of all
alleles of all genes of all individuals in a particular
population.
Full article >>>Histone Modifications
Although their
amino acid sequence (
primary structure) is unvarying, individual
histone molecules do vary in structure as a result of chemical
modifications that occur later to individual
amino acids.
These include adding: ...
Full article >>>sensilla
Modifications of the
exoskeleton of an arthropod that, along with nerve
cells, form sensory
receptors.
sensillum, A small
sense organ, especially in the arthropods.
Full article >>>Artificial
modification of a
gene in a specific and directed fashion. Typically refers to substituting one
DNA sequence for another to inactivate a
gene or introduce or correct a
mutation in a
gene.
Related Terms:
Gene ...
Full article >>>Descent with
modification: a "useful"
characteristic
A useful
characteristic upon which to
base a definition of life is that of descent with
modification: the ability of a
life form to produce
offspring that are like its parent or parents, ...
Full article >>>Primates have
modifications to their
ulna and
radius (bones of the lower arm) allowing them to turn their hand without needing to turn their elbow. Many primates can also swivel or turn their arms at the shoulder.
Full article >>>POST-
TRANSLATIONAL
MODIFICATION -
Modifications made to a
polypeptide molecule after its initial synthesis, this includes proteolytic
cleavages,
phosphorylation,
glycosylation, carboxylation, addition of fatty acid moieties, etc.
Full article >>>Gene modification. The chemical repair of a
gene's defective
DNA sequence. See
DNA.
Gene pool. The totality of all
alleles of all genes of all individuals in a particular
population.
Gene splicing.
Full article >>>regulatory
enzyme An
enzyme which can be regulated by allosteric mechanisms or by covalent
modification. regulatory
gene A
gene that gives rise to a product involved in the regulation of the
expression of another
gene.
Full article >>>One
modification that may have been a key to their success was the
evolution of an upright stance. Amphibians and reptiles have a splayed stance and walk with an undulating pattern because their limbs are modified from fins.
Full article >>>Epigenetics refers to
modifications in
gene expression that are controlled by heritable but potentially reversible changes in
DNA methylation and/or
chromatin structure.
Related
Chromatin DNA methylation ...
Full article >>>: This term refers both to the
modification of genetic risk factors by
environmental risk and protective factors and to the role of specific genetic risk factors in determining individual differences in vulnerability to
environmental risk factors.
Full article >>>evolution -- Darwin's definition: descent with
modification. The term has been variously used and abused since Darwin to include everything from the
origin of man to the
origin of life.
Full article >>>zona re
action - in
mammals,
modification of the
zona pellucida that blocks polyspermy;
enzymes released by cortical granules digest
sperm receptor proteins ZP2 and ZP3 so that they can no longer bind
sperm.
Full article >>>strategy that focuses on
long-term prevention or
suppression of pest problems through a combination of techniques such as encouraging biological control, use of resistant varieties, and adoption of alternate cultural practices such as
modification of ...
Full article >>>Imprinting -- a chemical
modification of a
gene allele which can be used to identify maternal or paternal
origin of
chromosome.
Full article >>>Base: In
molecular biology, this term refers to the
purine bases adenine and
guanine, and the
pyrimidine bases uracil,
thymine, and
cytosine, or
modification of these
bases.
Full article >>>Since the
cloned
DNA may have been extensively modified (for example,
protein binding sites on the
promoter may have been altered or removed), this procedure is often used to test whether a particular
modification affects the function of a
gene.
Full article >>>'"/>