Biochemistry pp 141-169 | Cite as

Lipids and Membranes

  • J. Stenesh

Abstract

Lipids (from the Greek, meaning “fat”) comprise a heterogeneous group of organic compounds, insoluble (or sparingly soluble) in water, but soluble in nonpolar solvents such as chloroform, ether, and benzene. Lipids differ in their structure, but all have pronounced nonpolar groups, or both nonpolar and polar groups. Thus, lipids are either hydrophobic or amphipathic compounds. Unlike proteins and polysaccharides, lipids are small molecules, but they have a strong tendency to associate through noncovalent interactions. As major parts of their structure, many lipids have long hydrocarbon chains that may be saturated or unsaturated. Some lipids have specific roles and high biological activity. Among these, we find several vitamins and hormones. In addition, lipids have a number of general biological functions.

Keywords

Bile Acid Unsaturated Fatty Acid Lipid Bilayer Phosphatidic Acid Nerve Impulse 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer Science+Business Media New York 1998

Authors and Affiliations

  • J. Stenesh
    • 1
  1. 1.Western Michigan UniversityKalamazooUSA

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