These bonds create bends in the tail, as seen in the image below.Ī phospholipid starts as all of these constituent parts, floating around the cytosol. Unsaturated fatty acid chains have less hydrogen, forcing the molecule to form double carbon-carbon bonds. The fatty acid chains can be saturated, or unsaturated. Some species use three fatty acid chains, but two is most common. The second group, the hydrophobic tail, consists of two fatty acid chains. These groups are polar and are attracted to water. The hydrophilic head consists of a glycerol molecule bound to a phosphate group. Phospholipid StructureĪ phospholipid consists of two basic parts: the head and the tail. This semi-permeable membrane blocks the flow of polar substances, allowing the cell to control the concentration of various substances through the use of protein channels. When the phospholipid molecules are joined by other lipids and integral proteins, the surface can function as a cellular membrane. A bilayer of phospholipid molecules forms a plasma membrane. Subject to disclaimers.A phospholipid is an amphiphilic molecule consisting of a polar head region, a unit of glycerol, and two or more non-polar fatty acid tails, typically found in a cell membrane. A copy of the license is included in the section entitled GNU Free Documentation License. Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. CC BY-SA 3.0 Creative Commons Attribution-Share Alike 3.0 true true This licensing tag was added to this file as part of the GFDL licensing update. share alike – If you remix, transform, or build upon the material, you must distribute your contributions under the same or compatible license as the original.You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use. attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made.to share – to copy, distribute and transmit the work.This file is licensed under the Creative Commons Attribution-Share Alike 3.0 Unported license. I, the copyright holder of this work, hereby publish it under the following licenses:
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