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Related Concept Videos

Colloids03:22

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Children at play often make suspensions such as mixtures of mud and water, flour and water, or a suspension of solid pigments in water known as tempera paint. These suspensions are heterogeneous mixtures composed of relatively large particles that are visible to the naked eye or can be seen with a magnifying glass. They are cloudy, and the suspended particles settle out after mixing. On the other hand, a solution is a homogeneous mixture in which no settling occurs and in which the dissolved...
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The ER synthesizes lipids for building cell membranes and performing cellular functions such as energy storage and signaling. The lipid synthesis machinery embedded in the ER membrane primarily collects all reactants from the cytosol. Following synthesis, the secretory pathway and the ER contact sites distribute these lipids to other cellular organelles. Additionally, the energy-rich triacylglycerides are transported from the ER via lipid droplets.
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Different physical properties of lipids and proteins allow them to localize and form distinct islands or domains in the membrane. Some membrane domains are formed due to protein-protein interactions, whereas others are formed due to the presence of specific lipids such as sphingolipids and sterols—for example, large proteins, such as bacteriorhodopsin, aggregate and create distinct domains.
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Preparation, Purification, and Use of Fatty Acid-containing Liposomes
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Double Emulsion Droplets as a Plausible Step to Fatty Acid Protocells.

Jean-Paul Douliez1

  • 1Biologie du Fruit et Pathologie, UMR 1332, Institut National de Recherche Agronomique (INRAE), Université De Bordeaux, Villenave d'Ornon, F-33140, France.

Small Methods
|August 13, 2023
PubMed
Summary

Life may have originated from fatty acid vesicles formed in the deep ocean. These protocells, created using double emulsions, encapsulated prebiotic chemicals, offering a plausible pathway to early cellular life.

Keywords:
dewettingdouble emulsionsfatty acidsprotocellsvesicles

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Area of Science:

  • Origin of life studies
  • Biochemistry
  • Geochemistry

Background:

  • Fatty acid vesicles are considered simple precursors to modern cells.
  • Their formation and growth are studied, but encapsulating necessary prebiotic chemicals remains a challenge.

Conclusions:

  • Double emulsions provide a viable method for creating fatty acid protocells with encapsulated prebiotic chemicals.
  • The deep ocean, near hydrothermal vents, is a potential environment for this process.
  • This mechanism offers a pathway for the transition from simple amphiphiles to early cellular structures.