Dictionary » P » Phospholipid

Phospholipid

Definition

noun, plural: phospholipids

(1) A lipid with one or more phosphate groups attached to it.

(2) A lipid consisting of a glycerol bound to two fatty acids and a phosphate group.


Supplement

Phospholipids are amphipathic compounds in a way that the 'head' is hydrophilic and the lipophilic 'tail' is hydrophobic. They serve as a major structural component of most biological membranes. They form the lipid bilayer in cell membranes of organisms.

Examples of phospholipids include phosphatidylethanolamine, phosphatidylinositol, phosphatidylserine, lecithin, plasmalogens and sphingomyelins.


Word origin: phosphor- » from phosphorus + -lipid » from Greek lipos, fat.

Variant: phospholipide
Also called: phosphatide, phospholipin

Related terms:


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Re: Elastic cytoplasm film.

I don't know what a "cytoplasm film" would be. A black membrane system comes to mind, in which a planar phospholipid bilayer is formed by painting the phospholipids across a small aperture in a rigid sheet separating two chambers containing aqueous solutions. Such a system ...

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by efteling7
Sat Apr 12, 2014 12:56 pm
 
Forum: General Discussion
Topic: Elastic cytoplasm film.
Replies: 4
Views: 919

Re: Elastic cytoplasm film.

I don't know what a "cytoplasm film" would be. A black membrane system comes to mind, in which a planar phospholipid bilayer is formed by painting the phospholipids across a small aperture in a rigid sheet separating two chambers containing aqueous solutions. Such a system ...

See entire post
by jonmoulton
Fri Apr 11, 2014 2:36 pm
 
Forum: General Discussion
Topic: Elastic cytoplasm film.
Replies: 4
Views: 919

Re: Lipid Bilayers vs Micelles

... heads / hydrophobic tails is to form micelles, because this is the simplest structure that maximizes hydrophobic/philic interaction. In phospholipids, however, the hydrophobic tails have a greater cross-sectional area than the heads, and so they cannot form stable micelles - in other ...

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by squillss
Wed Feb 06, 2013 9:34 am
 
Forum: Molecular Biology
Topic: Lipid Bilayers vs Micelles
Replies: 3
Views: 7923

Phospholipids

Please, read: http://en.wikipedia.org/wiki/Phospholipid

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by Cat
Fri Sep 21, 2012 2:39 am
 
Forum: Cell Biology
Topic: Phospholipids
Replies: 4
Views: 3129

Need help with Plasma Membrane

... present but in small proportions and in form of mucopolysacchides etc. types of diffusion, simple diffusion is where substances pass through the phospholipid layer, and facilitated diffusion is when it passes through the proteins. yes, its true. osmosis is a special case of diffusion in which ...

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by shubham999
Mon Mar 19, 2012 5:32 am
 
Forum: Cell Biology
Topic: Need help with Plasma Membrane
Replies: 4
Views: 7586
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