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bilayer in Biological News

Researchers reveal HIV peptide's possible pathway into the cell

... to uncover how the peptide interacts with a lipid bilayer that is used to model the cell membrane. A highly ... system, the cell membrane is composed of a lipid bilayer (made up of two monolayers) designed to protect ... the influx of material. Each lipid in the bilayer has a polar, or charged, end and a non-polar end. ...

Nanotubes could help study retrovirus transmission between human cells

... of the cellular membrane. Giant lipid vesicles resemble micron-sized spherical soap bubbles that exist in water. They are composed of a lipid bilayer membrane only five nanometers thick. The object for experimenters was to create conditions in which the spheres would morph into cylinders of ...

Carnegie Mellon develops computer model to study cell membrane dynamics

... awry within a cell and leads to disease, Deserno said. Deserno and his team created a computer simulation of a cell membrane with a lipid bilayer a soap-like film made of 50,000 individual lipids molecules and studded it with 36 evenly spaced and contact lens-shaped disks representing ...

Biophysical Society announces winners of 2008 Minority Travel Awards

... of DNA. Danyell Wilson, University of Florida, Single Channel Analysis of a Mechanosensitive Channel Reconstituted in a Tethered Lipid bilayer Membrane Gated by an Applied Voltage. Ramallo Pardo, University of New Mexico, Mapping Nucleosome-DNA Interactions on Single Molecules of ...

With record resolution and sensitivity, tool images how life organizes in a cell membrane

... the Science study, Boxer and colleagues made a spherical lipid vesicle to model a cell membrane, placed it on a small silicon wafer to make the lipid bilayer flatten into two dimensions and organized the flat membrane with a pattern of chrome grids to provide ''landmarks'' on the surface. That system let ...

Wrinkled membranes create novel drug-delivery system

... his findings in the Feb. 17 issue of the journal Physical Review Letters. To make the capsules, Chaieb begins by confining a drug inside lipid bilayer membranes. Some of the lipids are then "sewn together" through a polymerization process. Cooling the capsules by 10 degrees Celsius causes the ...

Beyond genes: Lipid helps cell wall protein fold into proper shape

... or PE for short. Phospholipids, unlike their fatty acid and cholesterol cousins, include a phosphate group that spurs them to form a bilayer with water-friendly outer layers sandwiching an impermeable water-unfriendly inner layer that defines the outer surface of cells. Transport of ...
bilayer in Biological Technology

Bilayer graphene gets a bandgap

... and his colleagues have engineered a bandgap in bilayer graphene that can be precisely controlled from 0 ... the June 11 issue of Nature . Constructing a bilayer graphene transistor As with monolayer ... are arranged in "chickenwire" configuration, bilayer graphene which consists of two graphene layers ...

Scientists peel away the mystery behind gold's catalytic prowess

... of Standards and Technology (NIST) report that bilayer clusters measuring about one-half nanometer in ... was the clue that enabled us to identify the tiny bilayer clusters as the important species in the ... the active species in the catalyst are the tiny bilayer clusters. "We believe we have obtained the ...

Gold-palladium nanoparticles achieve greener, smarter production of hydrogen peroxide

... aldehydes in a more environmentally friendly manner. That reaction is important to the production of spices and perfumes. In 2008, they reported that bilayer clusters of gold nanoparticles measuring about 0.5 nm in diameter were responsible for enabling the oxidation of CO to CO 2 . Their research has ...

Scientists engineer superconducting thin films

... and in which part of the sample the superconductivity was located. To investigate this further, they synthesized more than 200 single-phase, bilayer and trilayer films with insulating, metallic, and superconducting blocks in all possible combinations and of varying layer thickness. The films were ...
bilayer in Biological Definition

Cell membrane

... or plasmalemma ) is a thin and structured bilayer of phospholipid and protein molecules that ... compartments. The foundation is a phospholipid bilayer , and the membrane as a whole is often described ... or hopanoids (in case of prokaryotes) in the bilayer assist in regulating fluidity. Detailed ...

Lipid bilayer

... A DPPC bilayer simulation Color scheme: PO4 = green, N(CH3)3 = ... = grey In biology and chemistry , a lipid bilayer is a membrane or zone of a membrane composed only of lipid molecules. The lipid bilayer is the foundation of all biological membranes , ...

Cell membrane

... or plasmalemma ) is a thin and structured bilayer of phospholipid and protein molecules that ... compartments. The foundation is a phospholipid bilayer , and the membrane as a whole is often described ... or hopanoids (in case of prokaryotes) in the bilayer assist in regulating fluidity. Detailed ...

Lipid

... nonpolar tails of lipids ( U ) tend to cluster together, forming a lipid bilayer (1) or a micelle (2). The polar heads ( P ) face the aqueous ... together. Figure 2: Self-organization of lipids. A lipid bilayer is shown on the left and a micelle on the right. The ...

Phospholipid

... is said to be hydrophobic . When placed in water, phospholipids form a bilayer , where the hydrophobic tails line up against each other, and forms a ... over the membrane. See also biochemistry lipid lipid bilayer antiphospholipid syndrome References Berg, J.M., J.L. ...

Transmembrane receptor

... The polypeptide chains of the simplest are predicted to cross the lipid bilayer only once, while others cross as many as seven times (the so-called ... cell or organelle. If the polypeptide chain of the receptor crosses the bilayer several times, the external domain can comprise several "loops" sticking ...

Biological membrane

... A biological membrane or biomembrane is a membrane which acts as a barrier within or around a cell . It is a lipid bilayer , being composed of a double layer of lipid -class molecules , specifically phospholipids , with occasional proteins intertwined, some of which ...

Cell biology

... Adhesion Chloroplast Cilia Cytoplasm Cytoskeleton Endoplasmic reticulum Flagella Glycolysis Golgi apparatus Lipid bilayer Membrane Mitochondrion Nucleus Organelle Passive transport Ribosome Signal transduction Vesicle Important ...

Chloroplast

... take, and are generally considered to have originated as endosymbiotic cyanobacteria . In green plants chloroplasts are surrounded by two lipid bilayer membranes , now thought to correspond to the outer and inner membranes of the ancestral cyanobacterium. The genome is considerably reduced ...

Chloroplast membrane

... function. Like mitochondria , chlorplasts have a double-membrane envelope, called the chloroplast envelope . Each membrane is a phospholipid bilayer , between 6 and 8 nm thick, and the two are separated by a gap of 10-20nm, called the intermembrane space. The outer membrane is permiable to most ...

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bilayer in Biological Dictionary

Phospholipid bilayer

... A lipid bilayer is a thin membrane made of two layers of lipid ... play an important role in the phospholipid bilayer . ... Lipid bilayer - Phospholipids - Proteolipids - ...

Cell membrane

... solid piece. ... The cell membrane is composed of a phospholipid bilayer studded with proteins. ... "Cartoon of a typical cell membrane . ... matrix of ... The structure of a cell membrane , showing its lipid bilayer and embedded proteins ... In animals, the cell membrane establishes ...

Virion

... Next to the common cold, influenza (the flu) is perhaps the most familiar ... The influenza virion is an enveloped virus that derives its lipid bilayer from ... ... virus particles, also called virions , contain genetic material, or ... virion ... Virion definition - Medical Dictionary ...

Plasma membrane

... ... Plasma membranes also contain protein and glycoprotein in addition to lipid, of ... The plasma membrane is composed of a bilayer of phospholipid molecules, plus ... A cell membrane (also known as a plasma membrane ) is a thin semifluid structure that separates the ...

Phospholipid

... ... phospholipids , ... Individual phospholipid molecules are able to move freely in the ... The arrangement of phospholipid molecules into a bilayer in an ... Supplies GMP grade phospholipids for worldwide drug manufacturers and develops new types of phospholipids and liposome formulations. ...

Nuclear membrane

... The nuclear envelope (NE) is a double lipid bilayer that encloses the genetic material in eukaryotic cells. The nuclear envelope also serves as the physical barrier, separating the contents of the ...

Nuclear lamina

... mechanical support, the nuclear lamina regulates important cellular events such as ... The nuclear envelope (NE) is a double lipid bilayer that encloses the genetic material in eukaryotic cells. The nuclear envelope also serves as the physical barrier, separating the contents of the ...

Liposomes

... lipid bubbles and are the foundation of Liposomal ... Liposomes ... Liposomes are different from micelles structurally in that they have a bilayer ... Nano- liposomes and ... Investigating the uptake and intracellular fate of pH-sensitive liposomes by ... Gadolinium-loaded liposomes ...

Lipids

... provides up-to-date resources for researchers, faculty, and clinicians in atherosclerosis and other lipid ... The packing of lipids within the bilayer also affects its mechanical properties, ... Lipids self-assemble into this structure because of the hydrophobic effect, ... The most abundant ...

Lipid

... of some common lipids . ... Other major lipid classes in the fatty acid category are the fatty esters and fatty amides. ... A lipid bilayer is a thin membrane made of two layers of lipid molecules. These membranes are flat sheets that form a continuous barrier around cells. The cell ...

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