Question

What is the basic structure of lecithins, and how do they work as emulsifiers, and in membranes?

Answer 1

Lecithin is actually a combination of lipid and phosphate which containsphosphorylcholine and diglyceride having two fatty acids . Its molecular formula is C42H80NO8P and it is obtained in L form so it's actual IUPAC name is          L-alpha-Phosphatidylcholine.

The membranes surrounding the cells of our body is composed of Lecithin . Lecithin provides stability to the cell membrane which is it's main function for cell membrane . If the lecithin is somehow degraded then the cell walls will degrade and the cell will die .

Lecithin is actually a natural emulsifier because it has both hydrophobic and hydrophilic property . The part of Lecithin which is hydrophilic is Choline and the two fatty acids are hydrophobic in nature . Lecithin contains both positive and negative ions so it can show emulsifiying property in any electrolyte where it is dissolved.