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Topic: Vesicle (biology)

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In the News (Tue 18 Jun 19)

  vesicle - Search Results - MSN Encarta
In cell biology, a vesicle is a relatively small and enclosed compartment, separated from the cytosol by at least one lipid bilayer.
Vesicle (biology), a relatively small and enclosed compartment within a cell; Vesicular texture, a small enclosed cavity found in some volcanic rock, such...
Vesicle In cellular biology, a vesicle is a relatively small and enclosed compartment, separated from the cytosol by at least one lipid bilayer.
encarta.msn.com /encnet/refpages/search.aspx?q=vesicle   (164 words)

  Biology - Karr.net   (Site not responding. Last check: )
Biology (from Greek bìο meaning life and Λoγος meaning the study of) is the study of life.
Biology encompasses a broad spectrum of academic fields that are often viewed as independent disciplines.
Biology is a branch of science employing the scientific method to characterize and investigate knowledge.
www.karr.net /encyclopedia/Biology   (600 words)

 Vesicle (biology) information - Search.com
In cell biology, a vesicle is a relatively small and enclosed compartment, separated from the cytosol by at least one lipid bilayer.
Matrix vesicles are cell-derived microstructures involved in the initiation of biomineralization in a variety of tissues including bone, cartilage, dentin and turkey leg tendon.
Clathrin coats are found on vesicles trafficking between the Golgi and plasma membrane, the Golgi and endosomes, and the plasma membrane and endosomes.
www.search.com /reference/Vesicle_(biology)   (457 words)

 Term Paper on Biology. Free Biology Essays and Research Papers
A small vacuole (vesicle) pinches off the smooth ER and carries the protein to the Golgi apparatus, where it is further processed.
The Biothics of Cloning Bioethics, which is the study of value judgments pertaining to human conduct in the area of biology and includes those related to the practice of medicine, has been an important aspect of all areas in the scientific field (Bernstein, Maurice, M.D.).
Biology - Genetics The Cystic Fibrosis Gene Introduction: Cystic fibrosis is an inherited autosomal recessive disease that exerts its main effects on the digestive system and the lungs.
www.customessaymeister.com /customessaytopics/Biology.htm   (7213 words)

 Rediscovering Biology - Unit 10 Neurobiology: Expert Interview Transcripts
So this membrane that belongs to the vesicle originally, and is now in the cell membrane, has to be retrieved, and the mechanism for that is called endocytosis, the opposite of exocytosis.
So what you can see is vesicles that sit there waiting at the membrane, and when the cell is stimulated and calcium goes inside, then these vesicles spread over the cell surface, or the dye in them spreads over the cell surface like the oil drop that you put in a puddle of water.
Vesicles have to have been sitting there for a while, and we can tell now how long that time is. It's about a third of a second.
www.learner.org /channel/courses/biology/units/neuro/experts/almers.html   (4378 words)

 Encyclopedia :: encyclopedia : Vesicle (biology)   (Site not responding. Last check: )
In cell biology, a vesicle is a relatively small and enclosed compartment, separated from the cytosol by at least one lipid bilayer.
Vesicles are a basic tool of the cell for organizing metabolism, transport, enzyme storage, as well as being chemical reaction chambers.
Many vesicles are made in the Golgi apparatus, but also in the endoplasmic reticulum, or are made from parts of the plasma membrane.
www.hallencyclopedia.com /topic/Vesicle_(biology).html   (246 words)

 Clark University | Biology | Home Page
The major in biology is especially suitable for students who intend to go on to professional schools in the health sciences or graduate work in a variety of subfields of the biological sciences.
Whether studying such diverse topics as evolutionary biology, fungal genealogy, developmental genetics, or marine ecosystems, biology students at Clark are receiving the theoretical and practical skills to face the ongoing and unforeseen challenges in their field.
The study of biology at Clark is enriched by interactions among undergraduates, graduate students and faculty working together in the laboratory.
www.clarku.edu /~biol   (487 words)

 Receptor Mediated Endocytosis
Receptors are brought to the plasma membrane by vesicles from the trans region of the Golgi complex.
Once the vesicle has formed, the clathrin coat is lost (perhaps via a chaperone protein of the heat shock protein 70 family).
The vesicle then buds from the plasma membrane and forms an endocytic vesicle which fuses with other endocytic vesicles to form the early endosome (Rab5-GTP is instrumental in this homotypic fusion of the endocytic vesicles to form endosomes).
www.cytochemistry.net /Cell-biology/recend.htm   (1978 words)

 * Vesicle - (Biology): Definition
Vesicles and vacuoles that fuse with the cell membrane may be utilized to release or transport chemicals out of the cell or to allow them to enter a cell.
The transport vesicles from the ER fuse with the cis face of the Golgi apparatus (to the cisternae) and empty their protein content into the Golgi lumen.
Membrane-bound vesicles constructed in the laboratory to transport biological molecules.
en.mimi.hu /biology/vesicle.html   (566 words)

 Biology Faculty :: Charles Sullivan
If this is the case, then the optic vesicle would still have a role in determining where a lens forms during development because the inhibitory signal from neural crest cells would never reach the cells which then differentiate into the lens.
It is possible that the tight adhesion between lens ectoderm and the optic vesicles (ov) prevents neural crest cells from migrating under future lens cells.
If this is the case, then the optic vesicle would still have a role in determining where a lens forms during development because the inhibitory signal from neural crest cells would never reach the lens cells.
www.grinnell.edu /academic/biology/faculty/sullivan/txt   (632 words)

 Endocytosis, Exocytosis and Vesicle Traffic in Plants - Cambridge University Press   (Site not responding. Last check: )
The transport of macromolecules in membrane bounded vesicles is a fundamental process of all eukaryotic cells.
The biochemistry, cell biology and molecular biology of each is considered and particular attention is given to those specialised cell systems in which vesicle traffic is of particular importance.
Vesicle transport to the vacuole and the central role of the Golgi apparatus; 9.
www.cambridge.org /catalogue/print.asp?isbn=0521381088&print=y   (382 words)

 Developmental Biology Glossary
This Biology 176 Glossary was begun in Fall 1995 by the Biology 212 class at Lafayette College; it continues to be developed at USD.
acrosomal vesicle - membrane-bound organelle in the head of a sperm that is derived from the golgi apparatus; the vesicle containing enzymes that digest proteins and complex sugars in the outer coverings of an egg.
Fusion of the acrosomal vesicle with the plasma membrane of the sperm (in the "acrosome reaction") exposes receptors that bind to the egg surface and is necessary for fertilization.
home.sandiego.edu /~cloer/bio176f02/176gloss.html   (6049 words)

 Eric Schwartz
The control of vesicle cycling has been studied by recording the synaptic signal transmitted between identified cells is a retinal slice.
Alternatively, vesicles can be labeled with fluorescent dyes and their movements imaged with quantitative methods.
We expect to use TIR and correlation spectroscopy to study the mechanics of vesicle cycling and the movement of vesicle proteins in the plasmalemma.
cmp.bsd.uchicago.edu /faculty/eSchwartz.html   (445 words)

 Vesicles from Space, Press Release (1/30/01 PNAS)   (Site not responding. Last check: )
Vesicles are microscopic, hollow droplets with sizes, shapes and structures similar to those of certain living cells.
This is a vesicle (~10 µm across) glowing under fl light in the microscope made from the bulk residue.
Proof that it is a hollow vesicle, rather than a simple drop of oil, is the green pyranine dye which we have trapped inside of it.
web99.arc.nasa.gov /~astrochm/vesicle.html   (1384 words)

 Vesicle - definition from Biology-Online.org
vesicles of dimensions in excess of 50nm are believed to be important in intracellular transport processes.
A small anatomically normal sac or bladderlike structure (especially one containing fluid).Any small sac-like structure in the body, for instance, after [[protein synthesis, after the protein has been processed in the [[golgi apparatus, a glycoprotein vesicle is pinched off in the form of a vesicle, that can travel towards its destination and be secreted.
This page was last modified 02:05, 27 October 2006.
www.biology-online.org /dictionary/Vesicle   (165 words)

 Vesicle (biology)   (Site not responding. Last check: )
In cell biology, a vesicle is a relatively small and enclosed compartment, separated from the cytosol by at least one lipid bilayer.
This biomembrane enclosing the vesicle is the same as that of the outer cellular membrane.
Vesicles are a basic tool of the cell for organizing metabolism, transport, enzyme storage, as well as being chemical reaction chambers.
www.guideofpills.com /Vesicle_(biology).html   (550 words)

 Apical growth   (Site not responding. Last check: )
This consists of a cluster of small, membrane-bound vesicles embedded in a meshwork of actin microfilaments.
At maturity the vesicle wall ruptures and the vesicle sap squirts the sporangium for a distance of several centimetres.
The vesicle acts as a lens, focusing light on this pigment and causing the sporangiophore to bend so that the sporangium is shot towards the light source.
helios.bto.ed.ac.uk /bto/microbes/apical.htm   (3798 words)

 The Golgi Complex
Note that the vesicle are moving to contribute to the cis-Golgi network of vesicles and cisternae.
The inside of the vesicle becomes continuous with the inside of the Golgi cisternae, so that protein groups pointing towards the inside, could eventually be directed to face the outside of the cell.
The numerous vesicles in the area are transporting the proteins to and from cisternae.
cellbio.utmb.edu /cellbio/golgi.htm   (1209 words)

 ScienceDaily: Structure Reveals Details Of Cell's Cargo-Carriers
Understanding vesicle "budding" is one of the prerequisites for learning how proteins and other molecules are routed to their correct destinations in the cell.
The pre-budding complex is the triggering component of a protein coat called COPII that grabs a section of the ER membrane, pinches it off to form the vesicle and packages the protein cargo to be transported.
The new structure hints at how the coat disassembles itself by, in effect, "breaking the mold" around the vesicle, and freeing it to carry its protein cargo away to be released at the right place in the cell.
www.sciencedaily.com /releases/2002/09/020919071305.htm   (862 words)

 Dept of MCB, Harvard U: News and Events - MCB News
Once used, synaptic vesicles are recycled locally for future release of neurotransmitter – such local recycling is critical for keeping up synaptic function because synapses are typically far away from neuronal cell bodies that produce new vesicles.
Specifically, the authors asked whether newly endocytosed vesicles were locally and immediately reused for another round of neurotransmitter release, or whether they were mobilized to the back of the vesicle queue for later reuse (forming part of a pool of vesicles known as the reserve pool).
Using both fluorescence imaging of spH responses and dual patch-clamp recordings, the authors found that once a vesicle fuses with the plasma membrane it is subsequently retrieved and taken to the reserve pool.
mcb.harvard.edu /NewsEvents/News/Murthy.html   (538 words)

 Susan Ferro-Novick
The tethers physically link a transport vesicle to its appropriate acceptor compartment, the Rabs are GTPases that regulate vesicle tethering, and the SNAREs are cytoplasmically oriented membrane proteins that reside on vesicles and target organelles.
The interaction of a transport vesicle with its target membrane is a multistage process that involves recognition followed by one or more tethering events.
The exocyst is a multisubunit complex that was originally identified for its role in tethering post-Golgi vesicles to the plasma membrane.
www.hhmi.org /research/investigators/ferronovick.html   (974 words)

 Pietro De Camilli - Yale Cell Biology   (Site not responding. Last check: )
Synaptic vesicles deliver their content into the synaptic space by fusion with the plasma membrane (exocytosis) and are rapidly reformed by the endocytosis and recycling of their membranes.
These studies have led us to discover an important function of inositol phospholipids (phosphoinositides) in synaptic vesicle recycling and we are actively pursuing studies on the regulatory function of these phospholipids at synapses.
A cycle of PI(4,5)P2 synthesis and hydrolysis accompanies the exo-endocytosis of synaptic vesicles at synapses.
www.cellbiology.yale.edu /cellbio/html/faculty/p_camilli.shtml   (630 words)

 Derek Toomre - Yale Cell Biology   (Site not responding. Last check: )
One important challenge facing modern biology is to understand how individual biochemical reactions are integrated in space and time.
Increasingly, new vital probes and optical methods has begun to provide unique mechanistic insight into how molecules, vesicles, organelles and whole cells are (re)organized in response to internal and external cues.
The time-lapse series is shown in 1 second intervals (left-to-right) and when the vesicle fuses an enormous flash is seen (see Toomre et eal., 2000 [PDF]).
www.cellbiology.yale.edu /cellbio/html/faculty/d_toomre.shtml   (714 words)

 Genome Biology | Full text | The syntaxins
Factors that determine the specificity of the docking and fusion of vesicles to the correct target membranes were subsequently identified from their incorporation, again in a cell-free assay, into a 20S assembly complex with recombinant NSF and α-SNAP [2].
On the other hand, one explanation for the apparent multiple functions of the predominantly TGN-localized syntaxin 6 is that it is perhaps not a true syntaxin, even though it has been categorized as one, as its SNARE domain resembles that of the SNAP23/25/29 family members more than the syntaxins [6].
In perhaps most instances, vesicle docking is preceded by a process known as tethering, whereby molecules known as tethering factors bring vesicles close to the target membrane, to enhance productive docking and fusion.
genomebiology.com /2001/2/11/reviews/3012   (3041 words)

 Siena College - Biology Department - John Hayden   (Site not responding. Last check: )
I teach Cell Biology to Sophomores in the Fall semester and Biochemistry to Juniors and Seniors in the Spring semester.
It is our philosophy that the best way for students to learn biology is through hands-on experiences, performing experiments utilizing equipment currently in use in the research and industrial labs of today.
It in known that organelles and vesicles use mechanochemical motors to travel along microtubules and actin filaments to various locations in the cell, however, very little is known about the regulation of this process.
www.siena.edu /biology/faculty/hayden-fp.asp   (558 words)

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