Cholesterol is any of a class of certain organic molecules. A cholesterol is a sterol (or modified steroid), a type of lipid. Cholesterol is biosynthesized by all animal cells and is an essential structural component of animal cell membranes. When chemically isolated, it is a yellowish crystalline solid.
Cholesterol also serves as a precursor for the biosynthesis of steroid hormones, bile acid and vitamin D. Cholesterol is the principal sterol synthesized by all animals. In vertebrates, hepatic cells typically produce the greatest amounts. It is absent among prokaryotes (bacteria and archaea), although there are some exceptions, such as Mycoplasma, which require cholesterol for growth.
François Poulletier de la Salle first identified cholesterol in solid form in gallstones in 1769. However, it was not until 1815 that chemist Michel Eugène Chevreul named the compound "cholesterine".
- Fatty acidCarboxylic acid with a long aliphatic chain, which is either saturated or unsaturated
- Omega-3 fatty acidPolyunsaturated fatty acids (pufas) with a double bond (c=c) at the third carbon atom from the end of the carbon chain
- Fatty acid synthesisCreation of fatty acids from acetyl-coa and nadph through the action of enzymes called fatty acid synthases. this process takes place in the cytoplasm of the cell