Cell membrane

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  • Cp Essay

    Cell penetrating peptides are proteins or peptides that typically consist of 5-30 amino acids. These peptides are unique in that they are able to cross cell membranes and other barriers throughout the body such as the blood brain barrier, intestinal and nasal mucosa, and even skin. Using CPPs, scientists are now able to explore their potential as a means of transporting cargo into cells and across bio barriers. With their ease of preparation and generally nontoxic nature, CPPs have gained a…

    Words: 1698 - Pages: 7
  • The Phospholipids: The Plasma Membrane

    The plasma membrane also known as the cell membrane is found in every cell. The cell membrane is around 7-10nm, making it difficult to view even with a transmission scanning electron microscope (it only shows a double black line), this means that no one knows exactly what the membrane looks like. All membranes have the same basic structure made up from phospholipids (fats). The membrane is made up of a phospholipid bilayer; consisting of a polar phosphate head and two fatty acid tails. The head…

    Words: 1131 - Pages: 5
  • Serratia Marcescens Research Paper

    have a thin cell of a single layer of peptidoglycan that is enclosed by an outer membrane. The outer membrane is surrounded by special phospholipids composed of fatty acids called lipopolysaccharides that are attached to a glucosamine…

    Words: 1154 - Pages: 5
  • Bacteriorhodopsin Experiment

    Abstract Bacteriorhodopsin is located in the plasma membrane of Halobacterium halobium, where it acts as a proton-pump, transporting protons out of the cell. Since its discovery in 1979, much research has been done on Bacteriorhodopsin and there have been many advancements in our knowledge. Firstly, on its structure and function and secondly, on the conformational changes it undergoes during retinal isomerisation. Introduction Bacteriorhodopsin is a globular protein, (Henderson, 1975) which…

    Words: 2616 - Pages: 11
  • Calcium Signaling

    plasma membrane, as the resting concentration of Ca2+ in the cytoplasm is normally kept ˷100 nM, compared to the extracellular concentration which is ˷1.5mM. To continue low concentration within the cell, Ca2+ signals can be generated either from extracellular calcium or from within the intracellular stores. Some proteins within the cell act as sensors and buffers to ensure that the concentration remains within its range and does not rise above 10x-7M that can cause cell death. When cells are…

    Words: 1516 - Pages: 7
  • My First Chemistry Lab

    Phenacetin, Acetaminophen, and your favorite, Caffeine. The goal for the experiment was to determine where the drugs may reside according to their properties. We learned that there are parts in the cell that are more hydrophobic (water-fearing) and other parts that are hydrophilic (water-loving). The cell membrane is mostly hydrophobic and the cytosol is mostly hydrophilic. We made predictions of where the drugs would reach giving their chemical structure. This…

    Words: 715 - Pages: 3
  • Rhodopsin In ROS Membranes Case Study

    Early studies on the lateral diffusion of rhodopsin in ROS membranes resulted in viewing this visual receptor as monomeric entity freely diffusing in a phospholipid bilayer (Calvert et al., 2001; Chabre et al., 2003; Liebman et al., 1982; Poo and Cone, 1974). However, it is important to stress that the movement of rhodopsin restricted to approximately two-dimensional environment of membranous phospholipid bilayer would rather reduce its dynamic freedom by orders of magnitude relative to soluble…

    Words: 1082 - Pages: 4
  • Darcy's Law: Nonwoven Membrane Resistance In The Separation Process

    Darcy’s Law expresses flux of water without particles through a nonwoven membrane as follows: J=∆p/(μ.R_m ) (4) where, J is the permeation flux (m3/m2s), ∆p is the transnonwoven pressure (Pa), μ is the viscosity (Pa.s), and Rm is the clean nonwoven membrane resistance or intrinsic resistance (1/m). Since fouling is going to take place in the separation process, the permeation flux will always be lower than the flux given by Eq. 4. Cake resistance -formed by cake layer- and fouling resistance…

    Words: 1012 - Pages: 5
  • Human Serum Albumin Summary

    Summary Human Serum albumin (HSA) is a plasma protein in charge of the transportation of the fatty acids (Bhattacharya, Grune & Curry, 2000, p.721). HSA promotes the transportation capacity of plasma because it is currently at around 0.6Mm enabling it to carry more than six molecules of fatty acid. In addition, the HSA binds and agitates the pharmacokinetics of various drugs compounds. The HSA-fatty acid has two drug-binding sites, which are the sub-domains IIA and IIIA. The fatty acid IIIA…

    Words: 842 - Pages: 4
  • SIRT1 Essay

    4.2 RES as activator of sirtuins and other biological target structures There are several molecular activities discussed that should convey the health-promoting effects of RES. In one of the most important (if not the decisive one) study, it was shown that RES modulates the activity of the silent mating type information regulation 2 homolog 1 (SIRT1) (3). SIRT1 belongs to a protein family consisting of seven (SIRT1-SIRT7) individual members that are unique Nicotinamide adenine dinucleotide…

    Words: 1415 - Pages: 6
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