Lipid bilayer

    Page 1 of 8 - About 79 Essays
  • Antimicrobial Peptide Lab Report

    phospholipid head groups and the hydrophobic residues on the peptides with the hydrophobic core of the membrane 3) pore formation and micellization of the lipid bilayer occurs, leading to disintegration of the membrane allowing leakage of essential nutrients and ions, followed by complete cell lysis.[1][4] In the barrel-stave mechanism, α-helical peptides form transmembrane pores with their hydrophobic parts in contact with the external lipid environment and hydrophilic parts pointing inwards forming an aqueous pore. The steps in this process are as follows: (1) α-helical peptide monomers initially assemble on the membrane surface and bind to it forming a transmembrane channel (2) the helices then insert into the hydrophobic core (3) the monomers attract additional peptide monomers that helps increase the pore size.[1][4] The toroidal mechanism proposes that peptides form an α-helical structure only after interacting with the bacterial membranes. The helices are initially oriented parallel to the cell membrane. In this conformation, the hydrophobic peptide residues displace the polar lipid head groups. This causes thinning of the bacterial OM and a breach in the hydrophobic lipid layer. A combination of these factors, destabilizes the membrane integrity, making it more susceptible to further peptide interactions. When the lipid-to-peptide ratio reaches a critical value, the peptides orient themselves perpendicular to the membrane and start to self-associate thus enlarging…

    Words: 974 - Pages: 4
  • Viral Pathogens Essay

    Viral pathogens use liver cells to replicate, then attach to their lipid droplets to to accumulate, assemble and bud off into the rest of the body. Liver produces and secretes LDL, VLDL and HDL which are taken up by every cell in the body that uses cholesterol, including the liver cells that take them up too.2 Viruses hijack these lipoproteins and use them to get into the liver cells, where they replicate, which opens up a gateway to the rest of the body. They replicate within the endoplasmic…

    Words: 1044 - Pages: 5
  • Chlorella Vulgaris Research Paper

    different ways; wastewater treatments, production of protein-rich food and feed additives, and biofuel (Cakmak,Wells). Specialty oils, and cosmetics can also be products from algae (Griffiths et al). The limit of fossil fuels makes it more important to be able to find renewable energy resources. There are many positives that come from using microalgae as a renewable resource; it has a large lipid content, make…

    Words: 1592 - Pages: 7
  • Lipid Extraction Essay

    The major bottleneck for lipid extraction from the wet microalgae is the low extraction efficiency, because of the immiscibility of nonpolar organic solvents with water contained in wet microalgae {Yoo, 2012 #31} {Kim, 2013 #118}. Traditional method for lipid extraction from dry biomass uses a co-solvent system, which consist of a non-polar solvent and polar solvent {Halim, 2012 #7} {Kim, 2013 #118}. When the co-solvent system is directly applied to wet microalgal biomass, the microalgal cells…

    Words: 1101 - Pages: 4
  • Tpk-Trypsin Lab Report

    Culture Infective Dose (TCID50) will be used. In TCID50 serial dilutions from the supernatant of the infected cells will be used to cause cytopathic effects (CPE) on MDCK cells. The TCID50 will be lower in case of viperin-transfected cells compared to the negative control ones. Objective 3: Investigate the effect of viperin on the cell lipid rafts and investigate the IAV release from the cells in the presence of duck viperin. Human viperin inhibits FPPS, which inhibit the formation of lipid…

    Words: 1819 - Pages: 8
  • Liposomes Lab Report

    early years of their history from various lipid classes identical to those present in most biological membranes. liposomes were discovered in the mid of 1960’s and originally studied as cell membrane model Paul Ehrlich coined the term “magic bullet” in 20th century where carrier system was proposed to simply carry the drug to its of action and releasing its selectively while non – target sits should absolutely be example from drug effect.1-4 To pursue optimal drug action, functional molecules…

    Words: 1052 - Pages: 5
  • Lipid Biochemistry

    Lipids are fatty acids and their derivatives, and substances related biosynthetically or functionally to these compounds. Lipids are diverse group of organic compounds including fats, oils, hormones, and certain components of membranes that are grouped together and mainly amphipathic. The variation in head groups and aliphatic chains allows the presence of more than 1000 different lipid species in any eukaryotic cell. Different types of lipid include Phospholipids, Sphingolipids and…

    Words: 960 - Pages: 4
  • Pyrimidines: The Basic Structure Of DNA And RNA

    chains (Cooper, 2000). These chains are hydrophobic, meaning they do not like to interact with water molecules. Because of this, phospholipids of a cell membrane form a double layer, where the hydrophilic ends are exposed to both the extracellular fluid and the intracellular fluid, and the hydrophobic tails are buried within the membrane to avoid contact with water (Cooper, 2000). This arrangement represents the formation of cell membranes and is referred to as the lipid bilayer (Cooper, 2000).…

    Words: 1137 - Pages: 5
  • Plasma Membrane Structure Model

    introduced by Danielli and Davson. They proposed that the membrane is made of phospholipid bilayer that consists of hydrophobic head and the hydrophilic tail. Hydrophilic head, which is polar, facing towards the water molecules and said to be coated with protein. Hydrophilic tail, which is non-polar is not facing water molecules and sandwiched between the two bilayers. At regular intervals of the surface of the plasma membrane, there are also pores which are 1 nm size. The structure is stable,…

    Words: 1702 - Pages: 7
  • The Four Components Of Cell Membrane

    membrane which is a bilayer membrane that encloses the contents of the nucleus throughout the lifecycle of the cell. The membrane of the cell is selectively permeable meaning that it only allows certain things to go in and out. The cytoplasm which is surrounded by…

    Words: 817 - Pages: 4
  • Previous
    Page 1 2 3 4 5 6 7 8

Related Topics:

Popular Topics: