Alcoholic group is found in
a. Lecithin is a phospholipids ∴consists of —
= glycerol an Alcohol + fatty acid + phosphoric acid + choline
b. sphingomyelin is a phospholipids → contains - = fatty acids + phosphoric acid + choline + sphingosineshingosine is a complex Amino alcohol
c. Glycolipids =
Glycosphingosides: →simplest form is cerebroside: →eg. galactosylceramide→contain = galactose + fatty acid + sphingosine.
No phosphoric acid, no glycerol alcohol.
- Found. in brain, characteristically C24 fatty acids occurs in many glycosphingolipid, particularly those in brain eg. Lignoceric, cerebronic, and Nervonic acids. * Deficiency of β-glucosidase or β-gluco-cerebrosidoses→causes →Gaucher’s disease →accumulation of glucosylceramide.
Ganglioside contain —
Ceramidesphingosine + fatty acid + glucose and / or galactose + N. Acetyl galactosamine and sialic acid N-acetyl neuraminic acid
a. Tay-sack’s disease GM1gangliosidosis→due to deficiency of Hexosaminidase A
b. Sandhoff’s disease →to deficiency of Hexosaminidase A and B.
Now, clear from above, that lecithin contain glycerol a simple alcohol and rest contain sphingosine which is a complex amino alcohol