Phospholipid

Twoad group of the molecule, highlighted in red.
The U indicates the uncharged hydrophobic portion of the molecule, highlighted in blue.

Phosphatidyl choline is the major component of lecithin. Phosphatidylcholines are a class of Phospholipids which incorporate Choline as a headgroup Lecithin is any of a group of yellow-brownish fatty substances occurring in animal and plant tissues and in egg yolk composed of Phosphoric acid, Choline, It is also a source for choline in the synthesis of acetylcholine in cholinergic neurons. Choline is an Organic compound, classified as a water-soluble Essential nutrient and usually grouped within the Vitamin B complex

Phospholipids are a class of lipids, and a major component of all biological membranes, along with glycolipids, cholesterol and proteins. Lipids are broadly defined as any fat- Soluble ( lipophilic) naturally-occurring Molecule, such as fats oils waxes cholesterol sterols fat-soluble MembraneA biological membrane or biomembrane is an enclosing or separating Amphipathic layer that acts as a barrier within or around a cell. Glycolipids are Carbohydrate -attached Lipids. Their role is to provide Energy and also serve as markers for cellular recognition Cholesterol is a Lipid found in the Cell membranes and transported in the Blood plasma of all Animals It is an essential component of mammalian Proteins are large Organic compounds made of Amino acids arranged in a linear chain and joined together by Peptide bonds between the Carboxyl Understanding of the aggregation properties of these molecules is known as lipid polymorphism and forms part of current academic research. Polymorphism in biophysics is the aspect of the behaviour of Lipids that influences their long-range order i

Amphipathic character

Due to its polar nature, the head of a phospholipid is hydrophilic (attracted to water); the lipophilic (or often known as hydrophobic) tails are not attracted to water. Hydrophile, from the Greek (hydros "water" and φιλια (philia "friendship" refers to a physical property of a Molecule Water is a common Chemical substance that is essential for the survival of all known forms of Life. Lipophilicity, fat-liking, refers to the ability of a Chemical compound to dissolve in fats oils lipids and non-polar solvents such as Hexane or When placed in water, phospholipids form one of a number of lipid phases. In biological systems this is restricted to bilayers, in which the lipophilic tails line up against one another, forming a membrane with hydrophilic heads on both sides facing the water. A bilayer is a double layer of closely packed atoms or molecules See also Monolayer Lipid bilayer This allows it to form liposomes spontaneously, or small lipid vesicles, which can then be used to transport materials into living organisms and study diffusion rates into or out of a cell membrane. A liposome is a tiny bubble ( vesicle) made out of the same material as a cell membrane. A vesicle is a small bubble of liquid within a cell A more formal definition in Cell biology, would be that a vesicle is a relatively small intracellular membrane-enclosed

This membrane is partially permeable, capable of elastic movement, and has fluid properties, in which embedded proteins (integral or peripheral proteins) and phospholipid molecules are able to move laterally. FLUID ( F ast L ight '''U'''ser '''I'''nterface D esigner is a graphical editor that is used to produce FLTK Source code Such movement can be described by the Fluid Mosaic Model, that describes the membrane as a mosaic of lipid molecules that act as a solvent for all the substances and proteins within it, so proteins and lipid molecules are then free to diffuse laterally through the lipid matrix and migrate over the membrane. The cell membrane (also called the plasma membrane, plasmalemma, or "phospholipid bilayer" is a Selectively permeable Lipid bilayer Cholesterol contributes to membrane fluidity by hindering the packing together of phospholipids. Cholesterol is a Lipid found in the Cell membranes and transported in the Blood plasma of all Animals It is an essential component of mammalian However, this model has now been superseded, as through the study of lipid polymorphism it is now known that the behaviour of lipids under physiological (and other) conditions is not simple. Polymorphism in biophysics is the aspect of the behaviour of Lipids that influences their long-range order i

See also

• Alkylphosphocholines
• Antiphospholipid syndrome
• Biochemistry
• Lipid
• Lipid bilayer (e. Alkylphosphocholines are Phospholipid -like molecules that have been synthesised which have remarkable biological and therapeutic activities Antiphospholipid syndrome (APS or APLS or antiphospholipid antibody syndrome is a disorder of Coagulation, which causes blood clots ( Thrombosis) in both Biochemistry is the study of the chemical processes in living Organisms It deals with the Structure and function of cellular components such as Lipids are broadly defined as any fat- Soluble ( lipophilic) naturally-occurring Molecule, such as fats oils waxes cholesterol sterols fat-soluble A lipid bilayer or bilayer lipid membrane ( BLM) is a membrane composed of Lipid molecules (usually Phospholipids. g. , Cell membrane)
• Polymorphism (biophysics)

References

1. J. The cell membrane (also called the plasma membrane, plasmalemma, or "phospholipid bilayer" is a Selectively permeable Lipid bilayer Polymorphism in biophysics is the aspect of the behaviour of Lipids that influences their long-range order i M. Berg, J. L. Tymoczko, and L. Stryer, Biochemistry. 5th ed. 2002, New York: W. H. Freeman. xxxviii, 974, [976] (various pages)