lecture 11
... Rafts: liquid ordered domain – lipids are fluid in that they have a high degree of lateral diffusion, but the acyl chains are closed packed and ordered. Glycosphingolipids (particularly sphingolmyelin and glycosylphosphoinositolGPI anchored proteins preferentially partition into rafts.) ...
... Rafts: liquid ordered domain – lipids are fluid in that they have a high degree of lateral diffusion, but the acyl chains are closed packed and ordered. Glycosphingolipids (particularly sphingolmyelin and glycosylphosphoinositolGPI anchored proteins preferentially partition into rafts.) ...
membrane structure n function
... passage of most polar molecules. This barrier function is crucially important because it allows the cell to maintain concentrations of solutes in its cytosol that are different from those in the extracellular fluid and in each of the intracellular membrane enclosed compartments. To make use of this ...
... passage of most polar molecules. This barrier function is crucially important because it allows the cell to maintain concentrations of solutes in its cytosol that are different from those in the extracellular fluid and in each of the intracellular membrane enclosed compartments. To make use of this ...
CELL MEMBRANES LEARNING OBJECTIVES • At the end
... – Their nonpolar nature makes them hydrophobic (“water-fearing”). – The phosphate group is polar and hydrophilic (“water-loving”). PHOSPHOLIPIDS The partially hydrophilic, partially hydrophobic phospholipid spontaneously forms a bilayer: -fatty acids are on the inside -phosphate groups are on both s ...
... – Their nonpolar nature makes them hydrophobic (“water-fearing”). – The phosphate group is polar and hydrophilic (“water-loving”). PHOSPHOLIPIDS The partially hydrophilic, partially hydrophobic phospholipid spontaneously forms a bilayer: -fatty acids are on the inside -phosphate groups are on both s ...
Imaging Membrane Lipid Domains by Scanning Transmission X
... which tends to order the lipids - is referred to as a liquid-ordered phase. The coexistence of two liquid phases in the membrane causes phase separation, leading to a lateral variation in lipid composition. It is postulated, that these lateral variations play a key role in many cellular events. Unfo ...
... which tends to order the lipids - is referred to as a liquid-ordered phase. The coexistence of two liquid phases in the membrane causes phase separation, leading to a lateral variation in lipid composition. It is postulated, that these lateral variations play a key role in many cellular events. Unfo ...
Diffusion/Osmosis
... Know cells are enclosed within semipermeable membranes that regulate their interaction with their surroundings. ...
... Know cells are enclosed within semipermeable membranes that regulate their interaction with their surroundings. ...
Slide 1
... FIGURE 2-3: The transmembrane domains of integral membrane proteins are predominantly α-helices. This structure causes the amino acid side chains to project radially. When several parallel α-helices are closely packed, their side chains may intermesh as shown, or steric constraints may cause the fo ...
... FIGURE 2-3: The transmembrane domains of integral membrane proteins are predominantly α-helices. This structure causes the amino acid side chains to project radially. When several parallel α-helices are closely packed, their side chains may intermesh as shown, or steric constraints may cause the fo ...
Unit 4 Study Guide: Cell Membrane and Homeostasis Answer Key
... outside the cell is hypertonic and can cause dehydration. 10. The cell will have more water and less solutes inside the cell than outside causing the cell to swell (hypotonic). 11. Homeostasis is the body’s ability to maintain constant internal physical and chemical conditions. 12. If they can not m ...
... outside the cell is hypertonic and can cause dehydration. 10. The cell will have more water and less solutes inside the cell than outside causing the cell to swell (hypotonic). 11. Homeostasis is the body’s ability to maintain constant internal physical and chemical conditions. 12. If they can not m ...
Biochemistry 304 2014 Student Edition Membranes
... Integral (Intrinsic) proteins are tightly associated with the membrane lipids due to the thermodynamic effect of their hydrophobic interactions. Integral proteins are amphiphiles with the exteriors of the segments in the bilayer having predominately hydrophobic residues, while those segments in the ...
... Integral (Intrinsic) proteins are tightly associated with the membrane lipids due to the thermodynamic effect of their hydrophobic interactions. Integral proteins are amphiphiles with the exteriors of the segments in the bilayer having predominately hydrophobic residues, while those segments in the ...
Your Pre AP biology final exam
... Label the following drawings as hypotonic, isotonic and hypertonic and draw an arrow to indicate the direction water will move. (The cell membrane is semipermeable but will not allow the particles to move thru…only water) ...
... Label the following drawings as hypotonic, isotonic and hypertonic and draw an arrow to indicate the direction water will move. (The cell membrane is semipermeable but will not allow the particles to move thru…only water) ...
Ribosomes (20-30nm)
... Ribosomes (20-30nm) Small organelles often attached to the ER but also found in the cytoplasm Large (protein) and small (rRNA) subunits form the functional ribosome o Subunits bind with mRNA in the cytoplasm o This starts translation of mRNA for protein synthesise (assembly of amino acids into p ...
... Ribosomes (20-30nm) Small organelles often attached to the ER but also found in the cytoplasm Large (protein) and small (rRNA) subunits form the functional ribosome o Subunits bind with mRNA in the cytoplasm o This starts translation of mRNA for protein synthesise (assembly of amino acids into p ...
A-PC3267 Lect 9 2007 - NUS Physics Department
... tiny. Membranes resist dissolving even in environments with extremely low phospholipid concentration. ...
... tiny. Membranes resist dissolving even in environments with extremely low phospholipid concentration. ...
Cell Membrane
... conditions in a changing environment. Individual cells, as well as organisms, must maintain homeostasis in order to live. • One way that a cell maintains homeostasis is by controlling the movement of substances across the cell membrane. ...
... conditions in a changing environment. Individual cells, as well as organisms, must maintain homeostasis in order to live. • One way that a cell maintains homeostasis is by controlling the movement of substances across the cell membrane. ...
Chapter 5 Lesson 1 and 2 PPt
... 1. Explain the bilayer structure of cellular membranes. 2. Identify the function of other molecules found in the cellular membrane. 3. Describe a cell’s inside environment. ...
... 1. Explain the bilayer structure of cellular membranes. 2. Identify the function of other molecules found in the cellular membrane. 3. Describe a cell’s inside environment. ...
Chapter Two Mineral Nutrition of Plant
... protein. Their roles are tansport , structure.and transfer message etc. ·Phospholipid include polar head group composition: cholin, phosphate and glycerd. (nature: water-loving or called hydrophilic ) and nonpoplar tail group (14~24 carbon atoms long-chain fatty acids. Nature: water-fearing or calle ...
... protein. Their roles are tansport , structure.and transfer message etc. ·Phospholipid include polar head group composition: cholin, phosphate and glycerd. (nature: water-loving or called hydrophilic ) and nonpoplar tail group (14~24 carbon atoms long-chain fatty acids. Nature: water-fearing or calle ...
ch8_sec1 - LeMars Community Schools
... conditions in a changing environment. Individual cells, as well as organisms, must maintain homeostasis in order to live. • One way that a cell maintains homeostasis is by controlling the movement of substances across the cell membrane. ...
... conditions in a changing environment. Individual cells, as well as organisms, must maintain homeostasis in order to live. • One way that a cell maintains homeostasis is by controlling the movement of substances across the cell membrane. ...
Basic features of all cells
... high concentration to low concentration and doesn’t require energy. Active transport: molecules move through the membrane from areas of low concentration to areas of high concentration with the help of energy. It uses energy to move solutes against their gradients. ...
... high concentration to low concentration and doesn’t require energy. Active transport: molecules move through the membrane from areas of low concentration to areas of high concentration with the help of energy. It uses energy to move solutes against their gradients. ...
Organic Molecules
... IV. Lipids-three types • B. Structural lipids (phospholipids) – 3. form a bilayer of membrane – 4. fatty acid tails are hydrophobic – 5. try to get as far away from water as possible ...
... IV. Lipids-three types • B. Structural lipids (phospholipids) – 3. form a bilayer of membrane – 4. fatty acid tails are hydrophobic – 5. try to get as far away from water as possible ...
Lecture 18, Mar 5
... somewhat liquid-like (in a fluid state) within the bilayer. The nature of the phospholipids that make up the bilayer greatly influence the fluidity of the membrane. ...
... somewhat liquid-like (in a fluid state) within the bilayer. The nature of the phospholipids that make up the bilayer greatly influence the fluidity of the membrane. ...
Chapt 5 - Workforce Solutions
... information, including any information on linked sites and including, but not limited to, accuracy of the information or its completeness, timeliness, usefulness, adequacy, continued availability, or ownership. This solution is copyrighted by the institution that created it. Internal use by an organ ...
... information, including any information on linked sites and including, but not limited to, accuracy of the information or its completeness, timeliness, usefulness, adequacy, continued availability, or ownership. This solution is copyrighted by the institution that created it. Internal use by an organ ...
Model lipid bilayer
A model lipid bilayer is any bilayer assembled in vitro, as opposed to the bilayer of natural cell membranes or covering various sub-cellular structures like the nucleus. A model bilayer can be made with either synthetic or natural lipids. The simplest model systems contain only a single pure synthetic lipid. More physiologically relevant model bilayers can be made with mixtures of several synthetic or natural lipids.There are many different types of model bilayers, each having experimental advantages and disadvantages. The first system developed was the black lipid membrane or “painted” bilayer, which allows simple electrical characterization of bilayers but is short-lived and can be difficult to work with. Supported bilayers are anchored to a solid substrate, increasing stability and allowing the use of characterization tools not possible in bulk solution. These advantages come at the cost of unwanted substrate interactions which can denature membrane proteins.